Juggernaut AI vs RP Hypertrophy vs Alpha Progression (2026): Price, AI, Devices

Most workout apps record what you lift. Juggernaut AI, RP Hypertrophy and Alpha Progression go a step further: they tell you what to lift next, and change the plan based on how your training went. They are the best-known “autoregulating” lifting apps, and they cost very different amounts.

Juggernaut AI was built by powerlifter and coach Chad Wesley Smith and is aimed at strength.¹ RP Hypertrophy was designed by Dr. Mike Israetel of Renaissance Periodization and is aimed at muscle size.² Alpha Progression is a German app that suggests your weight and reps set by set, and it has a permanent free version.³⁴ A fourth app, MacroFactor Workouts, launched in January 2026 from the team behind the MacroFactor nutrition app, and now belongs in the same comparison.⁵

This guide compares all four on price, how each one adjusts your training, devices, health data and imports. Every price, limit and feature below was checked against each app’s US store listing and the developer’s own pages on 3 October 2026.

Juggernaut AI vs RP Hypertrophy vs Alpha Progression: the short answer

Juggernaut AI ($349.99/yr) is the strength and powerlifting app, adjusting your program from set ratings and a daily readiness check. RP Hypertrophy ($299.99/yr) is the muscle-size app, adjusting weekly sets from pump, soreness and workload feedback. Alpha Progression ($79.99/yr, or free with limits) suggests weight and reps set by set.⁶⁷⁸¹²³

	Juggernaut AI	RP Hypertrophy	Alpha Progression	MacroFactor Workouts	SensAI
Built for	Powerlifting and powerbuilding1	Muscle growth2	General lifting, set-by-set targets3	Strength and hypertrophy9	Conversational AI coaching10
How it adjusts	RPE per set, readiness score, check-ins1112	Pump, soreness and workload feedback2	Estimated 10RM, optional RIR13	Rule-based, from performance and RIR14	A coach you talk to, plus Apple Health data1015
Yearly price (US)	$349.996	$299.997	$79.998	$71.995	$69.9910
Monthly price (US)	$34.996	$34.997	$12.998	$11.995	$6.9910
Free trial	2 weeks via the website6	Not published	14 days, yearly plan only8	7 days5	7 days10
Free tier	Not published	Not published	Yes, unlimited logging4	No5	No
Android	Yes16	Yes16	Yes16	Yes16	No (iPhone and Apple Watch app10)
App Store rating	4.8 from 5,6551	4.3 from 2342	4.9 from 2,1953	4.8 from 4,6215	4.6 from 3610

Prices and ratings from the US App Store and each developer’s website, 3 October 2026, before tax.

How much do Juggernaut AI, RP Hypertrophy and Alpha Progression cost?

Juggernaut AI costs $34.99 a month or $349.99 a year. RP Hypertrophy costs $34.99 a month or $299.99 a year. Alpha Progression costs $12.99 a month or $79.99 a year, and has a free version. MacroFactor Workouts costs $11.99 a month, $47.99 for six months or $71.99 a year.⁶⁷⁸⁵

Plan	Juggernaut AI	RP Hypertrophy	Alpha Progression	MacroFactor Workouts
Free	Not published	Not published	Yes4	No5
Monthly	$34.996	$34.997	$12.998	$11.995
Six months	None	Mentioned in App Store text, not sold there2	None8	$47.995
Yearly	$349.996	$299.997	$79.998	$71.99, or $89.99 with MacroFactor nutrition517
Lifetime	Not published	Not published	None3	None5
Trial	2 weeks on both plans, via the website6	Not published	14 days on yearly, none on monthly8	7 days5
Refunds	Not published	30-day money-back, website purchases only7	“100% refund whenever you request one”4	Not published

Three details are easy to miss. Juggernaut AI’s yearly plan is sold on its website, with bonuses including “2 months free” and a “30 min 1 on 1 consultation” with Chad Wesley Smith; the US App Store lists only the $34.99 monthly plan.⁶¹ RP’s App Store description mentions “a 6 month term”, but no six-month plan appears in its in-app purchase list or on its website.²⁷ And RP’s money-back guarantee covers website purchases only. App Store refunds go through Apple.⁷

What do they cost over one and three years?

On published yearly prices, three years costs $1,049.97 for Juggernaut AI, $899.97 for RP Hypertrophy, $239.97 for Alpha Progression, $215.97 for MacroFactor Workouts and $209.97 for SensAI. Paid monthly for a year, Juggernaut AI and RP Hypertrophy each cost $419.88.⁶⁷⁸⁵¹⁰

	1 year (yearly plan)	1 year (monthly plan)	3 years (yearly plan)
Juggernaut AI	$349.99	$419.88	$1,049.97
RP Hypertrophy	$299.99	$419.88	$899.97
Alpha Progression	$79.99	$155.88	$239.97
MacroFactor Workouts	$71.99	$143.88	$215.97
SensAI	$69.99	$83.88	$209.97

Yearly price multiplied by three, and monthly price multiplied by twelve, before tax and any introductory offers.

How does each app adjust your training?

Juggernaut AI adjusts before, during and between sessions from your set ratings and a readiness score. RP Hypertrophy adds or removes sets each week from pump, soreness and workload ratings. Alpha Progression and MacroFactor Workouts recalculate weight and reps from what you actually lifted, with optional reps-in-reserve ratings.^1181314

	Juggernaut AI	RP Hypertrophy	Alpha Progression	MacroFactor Workouts
Main input	RPE on each set, daily readiness, end-of-session, week and block check-ins11	Pump, soreness and workload ratings2	Past performance, sets done today, planned targets, your gym’s weights13	Performance, RIR targets, rep ranges14
Effort scale	RPE11	Feedback ratings, not RPE	RIR, optional; inferred if you skip it13	RIR 0 to 6+, optional14
What changes	Load and volume, “pre-session, intra-session, session to session, week to week, block to block”1	Sets per muscle; load rises “a few percentage points each week”18	Weight and reps, “set to set”3	Weights and reps after each workout14
Readiness	0–100 score since v3.012	Not published	Not published	Not published
Deloads	Not published	Last week of every block19	Pro feature8	Not published
First session	Not published	Not published	“No progression recommendation the first time”13	No recommendations until you log training14
Described as	“Expert system artificial intelligence”20	Feedback-driven program2	Algorithm with an estimated 10RM13	“Rule-based logic, not generative AI”9

Juggernaut AI is the most aggressive about adjusting mid-session. Its warm-up ratings can raise the day’s target, for example “190 kg up to 192.5 kg”, and its 2.5 release added “Auto-Tuned Accessory Volume”: weekly check-ins that “automatically drop sets when your readiness score falls below 3”.²¹¹² Chad Wesley Smith described the engine in 2021: “Our expert system artificial intelligence uses these factors to create a totally individualized program with more than 10 Quadrillion Variations.”²⁰

RP Hypertrophy works mainly on volume. “Low pumps, barely sore, and rating workouts as easy = more sets,” its help center says, and “amazing pumps, so sore that you can’t heal on time, and too much volume = fewer sets.”¹⁸ When the next weight increment would fall outside your rep range, it adds a rep instead of weight.¹⁸

Alpha Progression works mainly on load. It keeps an estimated 10-rep max for each exercise and combines it with “the sets you have already completed in the current workout, your planned targets, and the weights available in your gym”.¹³ MacroFactor Workouts calls its version Smart Progression, and it makes its updates “as soon as you finish a workout” without changing your program’s structure.¹⁴

Does RPE and RIR autoregulation actually work?

Yes, for strength, though the evidence is modest. A meta-analysis of 8 studies in 166 athletes found autoregulated training beat fixed loading for maximum strength (effect size 0.64). In an 8-week trial, RPE-based and percentage-based squat programs both worked, with no significant difference between them.²²²³

Study	Who	What it tested	Main result
Zhang et al., 202122	8 studies, 166 athletes	Autoregulation vs fixed loading	Autoregulation better for maximum strength (ES 0.64, I² 0%)
Larsen et al., 202124	14 studies, 356 participants	Subjective and objective autoregulation	“All autoregulation training protocols resulted in an increase in 1-RM”
Helms et al., 201823	21 trained men, 8 weeks	RPE vs percentage-1RM loading	Squat +17.05 kg vs +13.91 kg, difference not significant
Helms et al., 201825	12 powerlifters	RPE “stops” to set volume	Volume can be autoregulated with RPE stops
Pelland et al., 202626	67 studies, 2,058 participants	Weekly volume	More volume helps size and strength, with diminishing returns

Eric Helms and Michael Zourdos, whose lab built the RIR-based RPE scale,²⁷ concluded from their 8-week trial that “both loading-types are effective. However, RPE-based loading may provide a small 1RM strength advantage in a majority of individuals.”²³²⁷ That is a fair summary of the field. Autoregulation is a sound way to set load, not a large advantage over a well-written fixed plan.

None of these studies tested an app. They tested coaches and researchers using RPE or RIR rules. Whether Juggernaut AI’s or RP’s specific rules match those results has not been published. For a deeper look at the method, see our guide to RPE and RIR autoregulation.

How accurate are your own RPE and RIR ratings?

Accurate to about one rep on average, with large individual differences. A meta-analysis of 12 studies found lifters underpredicted their reps to failure by 0.95 reps. Predictions were more accurate closer to failure, with heavier loads and in later sets. Training experience did not seem to matter.²⁸

This matters because every app here asks you to rate effort: Juggernaut AI by RPE on each set, Alpha Progression and MacroFactor Workouts by optional RIR, and RP by rating each session’s workload against weekly RIR targets.^1113141819 Halperin and colleagues found “considerable heterogeneity” in that 0.95-rep average (I² 97.9%), so some lifters are far off and some are close.²⁸ In a 2024 bench-press study of 24 trained men and women, Refalo, Helms and colleagues found an average absolute error of 0.65 reps at 1 and 3 reps in reserve. They found no relationship between accuracy and sex, years of training or relative strength.²⁹

Three practical rules follow from this:

• Rate heavy sets, not light ones. Ratings are more accurate close to failure and with heavier loads.²⁸
• Rate later sets more confidently. Accuracy improved in later sets in the pooled data.²⁸
• Use the optional rating if your app has one. Alpha Progression infers RIR when you skip it, and MacroFactor “strongly” recommends logging it.¹³¹⁴

Juggernaut AI vs RP Hypertrophy: which is better?

Juggernaut AI is better for strength and powerlifting: it periodizes the squat, bench and deadlift, adjusts within sessions and has meet-day tools. RP Hypertrophy is better for muscle size and is $50 a year cheaper. RP’s own help center recommends Juggernaut AI to lifters whose main goal is strength.^1126730

	Juggernaut AI	RP Hypertrophy
Goal	Powerlifting or powerbuilding;1 Bench Only and Strongman programs31	Muscle growth2
Yearly price	$349.996	$299.997
Feedback	RPE, readiness, check-ins11	Pump, soreness, workload2
Volume landmarks	“Individualized Volume Landmarks”1	MEV to MRV, by muscle priority32
Deloads	Not published	Last week of every block, every 4th to 6th week19
Rest timer	Live Activity rest timer12	None, “and that’s intentional”33
Web app	Not published	Yes, training.rpstrength.com7
Designed by	Chad Wesley Smith, with Tim Arnold1	Dr. Mike Israetel2

Both apps lean on the same idea: volume “landmarks” such as minimum effective volume (MEV) and maximum recoverable volume (MRV). RP’s Emphasize setting moves a muscle “from MEV (Minimum Effective Volume) up to MRV (Maximum Recoverable Volume)”, while Grow keeps you “closer to MEV”.³²

These are coaching heuristics, not thresholds measured in controlled trials. What the research does show is that more weekly sets produce more growth, with diminishing returns. A 2017 meta-analysis by Brad Schoenfeld’s group found each additional weekly set added 0.37% to muscle gain.³⁴ A 2026 meta-regression of 67 studies found the same shape, with diminishing returns “considerably more pronounced” for strength than for size.²⁶ For more, see our guide to training volume per muscle per week.

On deloads, the evidence is thinner than either app’s design suggests. In a 39-person, 9-week trial co-authored by Israetel himself, a one-week deload at the midpoint “appears to negatively influence measures of lower body muscle strength but has no effect on lower body hypertrophy”.³⁵ That is one small study, and it did not test RP’s app. Our guide to data-driven deload weeks covers the rest.

Israetel holds a doctorate in sport physiology from East Tennessee State University and co-founded RP with Nick Shaw.³³ Smith founded Juggernaut Training Systems and has posted a top-10 all-time powerlifting total in wraps of 1,055 kg.²⁰

RP Hypertrophy vs Alpha Progression: which is better?

Alpha Progression is better for most people who want muscle growth on a budget. It costs $79.99 a year against RP’s $299.99, has a free version and suggests weight and reps on every set. RP Hypertrophy is better if you want the app to manage your weekly volume per muscle and schedule your deloads.^8743219

	RP Hypertrophy	Alpha Progression
Yearly price	$299.997	$79.998
Free version	Not published	Unlimited logging, manual plans, 795 exercises with videos4
Plan generator	Meso Builder, 45+ premade plans72	Five splits, from full body to PPL-upper-lower36
Progression	Sets from feedback; load or reps weekly18	Weight and reps every set13
Technique videos	250+2	Every exercise, “filmed in a real gym”3
Languages	English2	133
App Store rating	4.3 from 2342	4.9 from 2,1953

The two apps disagree about proximity to failure. RP asks how a session felt; Alpha Progression asks how many reps you had left. The research gives Alpha’s approach a reasonable footing for hypertrophy. A 2023 meta-analysis led by Martin Refalo found only a “trivial advantage” for training to failure (effect size 0.19), and a 2024 meta-regression from Zourdos’s lab found “muscle hypertrophy improves as sets are terminated closer to failure”, while “strength gains were similar across a wide range of RIR”.³⁷³⁸

Alpha Progression was founded by Benjamin Schnabel, a personal trainer, and Marwin Sinapius, who leads product, design and software development.⁸³⁹ It has been on the App Store since 2019.³

Juggernaut AI vs Alpha Progression: which is better?

Juggernaut AI is better if you compete in powerlifting or want a full strength program with meet-day tools. Alpha Progression is better for everyone else: it costs under a quarter as much, suggests weight and reps on every set and lets you log for free. Neither lists an Apple Watch app.⁶⁸⁴¹³⁹

Juggernaut AI writes an entire periodized block around your squat, bench and deadlift, with a “Meet Day Tracking” feature added in version 3.0.¹² Alpha Progression builds a plan from five splits and then manages each set’s target, but it does not periodize toward a competition.³⁶¹³ If you compete, that difference decides it. If you lift to get stronger and bigger, the $270 a year gap is hard to justify.

Is MacroFactor Workouts better than Alpha Progression?

MacroFactor Workouts is cheaper ($71.99/yr vs $79.99) and adds Mac support, spreadsheet imports and a bundle with the MacroFactor nutrition app. Alpha Progression has a free version, more languages and more than six years more history. Both adjust weight and reps from what you lift, and both make RIR optional.^58491314

	MacroFactor Workouts	Alpha Progression
Yearly price	$71.99, or $89.99 bundled with nutrition517	$79.998
Free version	No, 7-day trial5	Yes4
Splits	Full body, upper/lower, PPL and more since v1.4.0405	Five splits36
Exercises	1,20040	79539
Import	Spreadsheet (.xlsx) workouts and programs; not from other apps9	None39
Apple Watch	Beta, per the developer; not listed on the App Store405	None, “on our roadmap”39
Launched	January 20265	September 20193

MacroFactor’s five co-owners include Greg Nuckols and YouTube coach Jeff Nippard, whose technique videos are built into the app.⁴¹⁹ Its research staff includes Dr. James Steele and Dr. Zac Robinson, both co-authors on studies cited in this guide.⁴¹²⁸³⁸ You can import Nippard’s paid programs if you already own them.⁹⁴⁰ The two MacroFactor apps share body metrics, but the developer says “there are no shared coaching features or automatic program adjustments between nutrition and training”.⁹

How do the options compare, including SensAI?

Juggernaut AI suits competitive strength athletes. RP Hypertrophy suits lifters who want volume managed for size. Alpha Progression and MacroFactor Workouts suit lifters who want set-by-set weight targets for under $80 a year. SensAI ($69.99/yr) suits people who want a coach to write and adjust the plan in conversation.¹²⁸⁵¹⁰

App	Approach	Yearly price (US)	Free option	Android
Juggernaut AI	Strength program with RPE and readiness	$349.996	None published	Yes16
RP Hypertrophy	Volume program from session feedback	$299.997	None published	Yes16
Alpha Progression	Set-by-set weight and rep targets	$79.998	Yes4	Yes16
MacroFactor Workouts	Rule-based progression, spreadsheet imports	$71.995	No5	Yes16
SensAI	Conversational AI coach using Apple Health data	$69.9910	None (7-day trial10)	No (iPhone and Apple Watch app10)

If you want an app that tracks rather than prescribes, our Hevy vs Strong vs Fitbod comparison covers the main loggers.

Where Juggernaut AI, RP and Alpha Progression beat SensAI

All four lifting apps run on Android, while SensAI has no Android app; it is built for iPhone and Apple Watch.¹⁶¹⁰ All four also run on older iPhones: Juggernaut AI and Alpha Progression need iOS 15.6, RP needs iOS 17.6 and MacroFactor Workouts iOS 18, while SensAI needs iOS 26.¹³²⁵¹⁰ Juggernaut AI has meet-day tools and a periodized powerlifting block, which SensAI does not offer. Alpha Progression has a free version, and SensAI does not.¹²⁴¹⁰

Where SensAI is different

SensAI is a coach you talk to, rather than a set of ratings you fill in.¹⁰ You can tell it “I tweaked my shoulder - adjust my week” and it rewrites the plan.¹⁰ For a lift you have never done, “SensAI estimates a starting point from your fitness data”, where Alpha Progression and MacroFactor wait until you have logged it.¹⁰¹³¹⁴

SensAI reads Apple Health only: your watch or ring app writes to Apple Health, and SensAI reads from there.¹⁵ Apple Watch is the only device on SensAI’s list that shares HRV. As SensAI’s Help Center puts it, “Sleep and overnight heart rate from your device shape how hard Coach asks you to push on a given day.”¹⁵ To see what your device shares, read how to connect a wearable to SensAI through Apple Health.

Which devices do Juggernaut AI, RP and Alpha Progression support?

All three run on iPhone and Android. RP Hypertrophy also has a web app. None of the three lists an Apple Watch app, and MacroFactor Workouts’ Watch app is still in beta. Alpha Progression and MacroFactor sync workouts and body data with Apple Health; Juggernaut AI does not publish which data it reads.^16739403142

	Juggernaut AI	RP Hypertrophy	Alpha Progression	MacroFactor Workouts
iPhone	iOS 15.6+1	iOS 17.6+2	iOS 15.6+3	iOS 18.0+5
Android	Yes16	Yes, since December 202516	Yes16	Yes16
Apple Watch	Not listed1	Not listed2	No4	Beta, not on the App Store405
Web	Not published	Yes7	No4	Not published
Apple Health	Yes; data types not published31	Not published	Workouts, calories, bodyweight, body fat39	Writes workouts4240
Uses HRV or sleep to adjust training	Not published; v3.0 tracks sleep trends12	Not published	Not published	Not published14
Import from other apps	Not published	No43	No39	No; .xlsx spreadsheets only9
Export	Session summary image; other formats not published12	Yes43	CSV, free39	Spreadsheet9

Requirements from each US App Store listing, 3 October 2026. “Not listed” means the App Store shows no Apple Watch compatibility.

The readiness question matters more than it looks. Juggernaut AI asks you to rate readiness yourself, and none of the three apps publishes that it reads heart rate variability or sleep from a wearable. The research supports looking at both. A 2024 review of HRV in strength and conditioning found “there is likely utility to HRV-guided programming”, while adding that “more data are needed”.⁴⁴ A 2022 meta-analysis found acute sleep loss cut exercise performance by 7.56% on average.⁴⁵ We found no meta-analysis testing HRV-guided programming for lifting specifically, so treat any app’s readiness score, SensAI’s included, as a guide rather than a verdict.

What changed in Juggernaut AI, RP and Alpha Progression in 2026?

Juggernaut AI was rebuilt from the ground up in version 3.0 on 11 August 2026, adding a 0–100 readiness score and meet-day tracking. Alpha Progression added 11 languages between July and September, reaching 13. RP Hypertrophy’s 2026 updates were small, and its latest was a bug-fix release. MacroFactor Workouts launched on 12 January 2026.¹¹²³²⁵

Date	App	Change
20 Dec 2025	RP Hypertrophy	Native iOS app released in the US46
12 Jan 2026	MacroFactor Workouts	Launches on iOS and Android516
Feb 2026	MacroFactor Workouts	Apple Health integration, v1.1.340
1 Jul 2026	Alpha Progression	Spanish, French and Brazilian Portuguese, v7.13
11 Aug 2026	Juggernaut AI	Version 3.0 rebuild: 0–100 readiness, habit tracker, recovery metrics, meet-day tracking112
2 Sep 2026	Alpha Progression	Japanese, completing 13 languages, v7.53
24 Sep 2026	Alpha Progression	CSV download and clipboard export, v7.63
30 Sep 2026	MacroFactor Workouts	New splits, including PPL, and four periodization schemes, v1.4.05
1 Oct 2026	RP Hypertrophy	Version 1.7.0, “Bug fixes and performance improvements”2

Juggernaut AI vs RP Hypertrophy vs Alpha Progression: which is the best autoregulation app?

The best autoregulation lifting app depends on your goal and budget. If you compete in powerlifting, choose Juggernaut AI. If you want muscle size and want the app to manage your volume, choose RP Hypertrophy. If you want set-by-set targets for under $80 a year, choose Alpha Progression, or MacroFactor Workouts if you already use MacroFactor.¹²⁸⁵

Choose Juggernaut AI if you:

• Compete in powerlifting or strongman, or want a periodized squat, bench and deadlift block
• Will rate RPE honestly on every set and check in on readiness daily
• Can justify $349.99 a year, or want the yearly plan’s consultation with Chad Wesley Smith

Choose RP Hypertrophy if you:

• Train mainly for muscle size and want weekly sets adjusted for you
• Want deloads scheduled automatically at the end of each block
• Like training from a browser as well as a phone

Choose Alpha Progression if you:

• Want weight and rep targets on every set without paying RP or Juggernaut prices
• Want to start free and upgrade later
• Train in a language other than English

Choose MacroFactor Workouts if you:

• Already use MacroFactor for nutrition and want the $89.99 bundle
• Run Jeff Nippard programs or keep your plans in spreadsheets

Look elsewhere if you:

• Want a coach you can talk to, who adjusts the plan from what you tell it and from your Apple Health data. That is what SensAI does. Our guide to AI-driven progressive overload explains the difference.
• Need an Apple Watch app today. None of the four lists one outside beta.

Frequently asked questions

Most questions come down to price, free versions, Apple Watch support and imports. Juggernaut AI costs $349.99 a year, RP Hypertrophy $299.99 and Alpha Progression $79.99 with a free version. None of the three lists an Apple Watch app, and none publishes a way to import history from other apps.^678413943

Juggernaut AI review: is it worth it?

For competitive powerlifters, probably: it periodizes the main lifts, adjusts within sessions and tracks meet days. For general strength training, $349.99 a year is hard to justify when Alpha Progression costs $79.99. The website lists a 2-week free trial on both plans.⁶¹²⁸

Is RP Hypertrophy worth it?

It is worth it if you want an app to manage weekly volume per muscle and schedule deloads, and you are happy at $299.99 a year. If you mainly want weight targets, Alpha Progression does that for less. RP does not publish a free trial; its 30-day money-back guarantee covers website purchases only.⁷³²¹⁹

Is Alpha Progression free?

Partly. The free version includes unlimited workout logging, manually created plans and all 795 exercises with videos, with no ads. The plan generator, weight and rep recommendations and charts need Pro, which costs $12.99 a month or $79.99 a year.⁴⁸

Juggernaut AI vs RP Hypertrophy: which is better for strength?

Juggernaut AI. It is built around powerlifting and periodizes the squat, bench and deadlift. RP’s own help center says that for lifters whose main objective is strength, “we generally recommend the Juggernaut AI app”.¹³⁰

Does Juggernaut AI (JuggernautAI) work with Apple Watch?

No Apple Watch app is listed on its App Store page. Juggernaut AI does integrate with Apple Health and Health Connect, but it does not publish which data it reads.¹³¹

Does RP Hypertrophy have an Android app?

Yes. RP Hypertrophy launched on Google Play in December 2025, alongside its native iOS app. It also still runs in a web browser.¹⁶⁴⁶⁷

Can I import my workouts into these apps?

Mostly no. Alpha Progression and RP Hypertrophy cannot import history from another app. MacroFactor Workouts imports workouts and programs from .xlsx spreadsheets, but not from other apps. Juggernaut AI does not publish an import option.³⁹⁴³⁹

Do these apps use HRV or sleep data?

None of the four publishes that it adjusts training from wearable HRV or sleep. Juggernaut AI’s version 3.0 tracks sleep and bodyweight trends alongside your workouts, and asks you to rate readiness yourself. SensAI reads sleep and overnight heart rate from Apple Health, and HRV from Apple Watch.¹²¹⁵

The bottom line

Juggernaut AI and RP Hypertrophy are the specialist, premium options: Juggernaut AI for strength and powerlifting at $349.99 a year, RP for muscle size at $299.99. Alpha Progression and MacroFactor Workouts give most lifters the core of autoregulation, set-by-set weight and rep targets, for about a quarter of the price.⁶⁷⁸⁵

The research supports the idea behind all four. Autoregulated training beat fixed loading for strength in pooled studies, and lifters can rate their reps in reserve to within about a rep.²²²⁸ It does not show that any one app’s rules are better than another’s. Those comparisons have not been published.

All four apps work from what you rate and log. If you would rather explain what is going on, from a tweaked shoulder to a bad night’s sleep, and have the plan rewritten around it, a conversational coach like SensAI fits better.

---

References

Footnotes

1. Juggernaut Apps, LLC. “JuggernautAI.” Apple App Store listing (id1515756471) — “Juggernaut Training Systems’ revolutionary A.I. strength training system”; “Your unique individualized program continues to adapt to your feedback with our Readiness Rating System, making adjustments to your program pre-session, intra-session, session to session, week to week, block to block, and program to program”; “Individualized Volume Landmarks”; goals of Powerlifting or Powerbuilding; “Designed by legendary coach Chad Wesley Smith with revolutionary technology by Tim Arnold”; in-app purchases “JuggernautAI Monthly $34.99”; requires iOS 15.6; no Apple Watch compatibility listed; version 3.0.0 (August 11, 2026) “We completely rebuilt JuggernautAI from the ground up”; version 3.0.12 (September 24, 2026); first released December 7, 2020; 4.8 rating from 5,655 ratings. Accessed October 3, 2026. https://apps.apple.com/us/app/id1515756471 ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰ ↩²¹ ↩²²

2. RP Strength LLC. “RP Hypertrophy.” Apple App Store listing (id1555614554) — “Build more muscle and get JACKED with the RP Hypertrophy app, designed by Dr. Mike Israetel”; “The app adjusts to your pump, soreness and workload feedback to create the perfect training plan week-by-week”; “45+ premade training plans”; “250+ technique videos”; “We offer 3 different subscriptions… monthly, a 6 month term or annually”; in-app purchases “Monthly Subscription $34.99”, “Yearly Subscription $299.99”; requires iOS 17.6; “Only for iPhone”; English; version 1.7.0 (October 1, 2026) “Bug fixes and performance improvements”; first released December 20, 2025; 4.3 rating from 234 ratings. Accessed October 3, 2026. https://apps.apple.com/us/app/id1555614554 ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰ ↩²¹ ↩²² ↩²³

3. Alpha Progression GmbH. “Alpha Progression Gym Tracker.” Apple App Store listing (id1462277793) — subtitle “Workout Planner & Lifting Log”; “Alpha Progression tells you exactly what to lift. Every set, every workout”; “Recommendations shift from set to set because fatigue is real: set 3 is not set 1”; “Every exercise filmed in a real gym with certified trainers”; in-app purchases $12.99 monthly and $79.99 yearly; 13 languages; requires iOS 15.6; version 7.1 (July 1, 2026) Spanish, French and Portuguese (BR); version 7.5 (September 2, 2026) Japanese; version 7.6 (September 24, 2026) CSV download and clipboard export; version 7.6.2 (September 30, 2026); first released September 23, 2019; 4.9 rating from 2,195 ratings. Accessed October 3, 2026. https://apps.apple.com/us/app/id1462277793 ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷

4. Alpha Progression. “Is Alpha Progression Pro worth it?” Pricing checked September 2026 — “a permanent free version with unlimited workout logging, manually created plans, all 795 built-in exercises and their demonstration videos, and no ads”; “We give a 100% refund whenever you request one”; “There is currently no dedicated Apple Watch or Wear OS app”; “There is currently no web-based workout logger or workout-history import feature.” Accessed October 3, 2026. https://alphaprogression.com/en/blog/alpha-progression-pro-worth-it ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵

5. Stronger By Science Technologies LLC. “MacroFactor Workouts - Tracker.” Apple App Store listing (id6737156524) — “$11.99 / month”, “$47.99 / half year”, “$71.99 / year”; “Annual Subscription Bundle $89.99”; “Download to start your 7-day trial”; “MacroFactor Workouts has a free trial, but does not offer a free subscription tier”; requires iOS 18.0; no Apple Watch compatibility listed; version 1.4.0 (September 30, 2026) new split options including PPL and “Static, Linear, Reverse Linear, and Undulating rep progression schemes”; first released January 12, 2026; 4.8 rating from 4,621 ratings. Accessed October 3, 2026. https://apps.apple.com/us/app/id6737156524 ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰ ↩²¹ ↩²² ↩²³ ↩²⁴ ↩²⁵ ↩²⁶ ↩²⁷ ↩²⁸ ↩²⁹ ↩³⁰ ↩³¹

6. JuggernautAI. “Pricing.” Monthly $34.99 and yearly $349.99, each with a “2 week free trial”; yearly bonuses include “2 months free” and “30 min 1 on 1 consultation with Juggernaut Head Coach, Chad Wesley Smith ($150 value)”. Accessed October 3, 2026. https://www.juggernautai.app/pricing ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷

7. RP Strength. “RP Hypertrophy App.” “Annual Membership $24.99/month $299.99 Billed Yearly”; “Monthly Membership $34.99/month Billed Monthly”; “Risk Free, 30 Day Moneyback Guarantee”, refunds “only for purchases made directly on our website”; Meso Builder; “You can sign in by going to training.rpstrength.com”. Accessed October 3, 2026. https://rpstrength.com/pages/hypertrophy-app ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰ ↩²¹ ↩²² ↩²³

8. Alpha Progression. Homepage FAQ — “$12.99 per month or $79.99 per year”; “Eligible new customers can try the annual plan free for 14 days… The monthly plan has no free trial”; free plan: “No plan generator / No recommendations / No charts”; “Alpha Progression was founded by Benjamin Schnabel and Marwin Sinapius.” Accessed October 3, 2026. https://alphaprogression.com/en ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰ ↩²¹ ↩²² ↩²³ ↩²⁴

9. MacroFactor. “MacroFactor Workouts.” “Smart progression in MacroFactor Workouts is driven by rule-based logic, not generative AI”; “At launch, MacroFactor Workouts is focused on supporting strength and hypertrophy goals”; “You cannot import past workout data from other apps. You can import workouts or full programs using a supported spreadsheet file”; Jeff Nippard programs importable if “you already own the program”; “Exercise technique videos by Jeff Nippard”; “there are no shared coaching features or automatic program adjustments between nutrition and training”; “Export your data any time”. Accessed October 3, 2026. https://macrofactor.com/workouts/ ; MacroFactor Help Center, “How to import a workout or program”: “Only .xlsx files are supported.” https://help.macrofactorapp.com/en/articles/287-how-to-import-a-workout-or-program ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰

10. Origami, Inc. “SensAI: Fitness Sensei.” Apple App Store listing (id6738963099) — SensAI Premium $6.99 monthly, $69.99 yearly; “get full access free for 7 days. No subscription required to start”; “500+ exercises with form guides”; “Never done it? SensAI estimates a starting point from your fitness data”; conversational Coach (“I tweaked my shoulder - adjust my week”); requires iOS 26.0 and watchOS 26.0; iPhone and Apple Watch; 4.6 rating from 36 ratings. Accessed October 3, 2026. https://apps.apple.com/us/app/sensai-fitness-sensei/id6738963099 ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸

11. JuggernautAI. “5 Tips to Get the Most Out of the JuggernautAI App.” Rating sets by RPE; “Your Daily Readiness Rating, End of Session/Week/Block Check-Ins are how the system learns about you”. Accessed October 3, 2026. https://www.juggernautai.app/blog/5-tips-to-get-the-most-out-of-the-juggernautai-app ↩ ↩² ↩³ ↩⁴ ↩⁵

12. JuggernautAI. “JuggernautAI v3.0 Is Here” — “Readiness scores are normalized to a simple 0–100 scale with mapped zones”; Habit Tracker; “Recovery Metrics: Track sleep and bodyweight trends right alongside your workout data”; Live Activities rest timer; Calendar View; Meet Day Tracking. https://www.juggernautai.app/blog/juggernautai-v3-0-is-here ; “JuggernautAI 2.5” — “Weekly check-ins automatically drop sets when your readiness score falls below 3”; “Download your session summary as a clean image and share it anywhere”. https://www.juggernautai.app/blog/juggernautai-25 . Accessed October 3, 2026. ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³

13. Marwin Sinapius. “Alpha Progression progression recommendations.” Alpha Progression, September 15, 2026 — “They combine your previous performance with the sets you have already completed in the current workout, your planned targets, and the weights available in your gym. If you track RIR, they also account for how many repetitions you had left”; “Internally, the system uses an estimated 10RM”; “Without RIR tracking, Alpha Progression uses its own algorithm to infer RIR from your performance”; “There is no progression recommendation the first time you perform an exercise”. https://alphaprogression.com/en/blog/alpha-progression-progression-recommendations ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³

14. MacroFactor Help Center. “Understanding and using Smart Progressions.” “Smart Progression automatically adjusts your weights and reps during a program based on your performance, RIR targets, and rep ranges”; “You will need to log your training before Smart Progression begins generating recommendations.” https://help.macrofactorapp.com/en/articles/305-understanding-and-using-smart-progressions ; “RIR in MacroFactor Workouts is logged on a scale from 0 to 6+”; “Tracking RIR is optional, but it is strongly recommended.” https://help.macrofactorapp.com/en/articles/385 ; updates occur “as soon as you finish a workout” and “Your program and overall structure will not change automatically.” https://help.macrofactorapp.com/en/articles/369 . Accessed October 3, 2026. ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹²

15. SensAI Help Center. “Connect your wearable to SensAI through Apple Health.” Last updated September 25, 2026 — SensAI reads Apple Health only; HRV reaches Coach only from Apple Watch; vendor scores such as Garmin Body Battery and WHOOP Recovery stay in their own apps; “Sleep and overnight heart rate from your device shape how hard Coach asks you to push on a given day.” https://www.sensai.fit/help/connect-wearable-to-sensai-apple-health ↩ ↩² ↩³ ↩⁴

16. Google Play listings checked October 3, 2026: JuggernautAI (4.6 from 2.62K reviews, 100K+ downloads) https://play.google.com/store/apps/details?id=com.jtsstrength.juggernautai ; RP Hypertrophy (4.3 from 147 reviews, 10K+ downloads, released December 21, 2025) https://play.google.com/store/apps/details?id=com.rp.hypertrophy ; Alpha Progression (4.8 from 21.2K reviews, 1M+ downloads) https://play.google.com/store/apps/details?id=com.alphaprogression.alphaprogression ; MacroFactor Workouts (4.8 from 3.44K reviews, 100K+ downloads) https://play.google.com/store/apps/details?id=com.sbs.train ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶

17. MacroFactor. “MacroFactor Workouts pricing.” “Your bundled plan will be $89.99/year for access to both apps.” Accessed October 3, 2026. https://macrofactor.com/workouts/price/ ↩ ↩²

18. RP Strength Help Center. “Hypertrophy App Progressions.” “weight is increased by a few percentage points each week”; “if the next weight increment is outside of that range… it adds a rep to each set instead”; “Set numbers are adjusted by how pumped, sore, and beat up from volume you feel”; “Low pumps, barely sore, and rating workouts as easy = more sets”; “Amazing pumps, so sore that you can’t heal on time, and too much volume = fewer sets”. Accessed October 3, 2026. https://help.rpstrength.com/hc/en-us/articles/32600173777815-Hypertrophy-App-Progressions ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶

19. RP Strength Help Center. Deload articles — “Yes, the last week of the block is always a deload.” https://help.rpstrength.com/hc/en-us/articles/33510413024279-Sudden-Drop-In-Workload ; “it will land on every 4th, 5th, or 6th training week” https://help.rpstrength.com/hc/en-us/articles/31639551676439 . Accessed October 3, 2026. ↩ ↩² ↩³ ↩⁴ ↩⁵

20. Chad Wesley Smith. “How JuggernautAI Works.” Juggernaut Training Systems, January 27, 2021 — “Our expert system artificial intelligence uses these factors to create a totally individualized program with more than 10 Quadrillion Variations.” https://www.jtsstrength.com/how-juggernautai-works/ ; coach profile: “owner and founder of Juggernaut Training Systems… posted Top 10 All-Time Total in wraps (1055kg/2325#)”. https://www.jtsstrength.com/coaches/chad-wesley-smith-2/ . Accessed October 3, 2026. ↩ ↩² ↩³

21. JuggernautAI. “Optimizing Your Warmups.” Warm-up ratings adjust the day’s target: “the app might adjust your initial target of 190 kg up to 192.5 kg.” Accessed October 3, 2026. https://www.juggernautai.app/blog/optimizing-your-warmups ↩

22. Zhang X, Li H, Bi S, Luo Y, Cao Y, Zhang G. “Auto-Regulation Method vs. Fixed-Loading Method in Maximum Strength Training for Athletes: A Systematic Review and Meta-Analysis.” Frontiers in Physiology, 2021;12:651112. PMID: 33776802. https://pubmed.ncbi.nlm.nih.gov/33776802/ ↩ ↩² ↩³

23. Helms ER, Byrnes RK, Cooke DM, Haischer MH, Carzoli JP, Johnson TK, Cross MR, Cronin JB, Storey AG, Zourdos MC. “RPE vs. Percentage 1RM Loading in Periodized Programs Matched for Sets and Repetitions.” Frontiers in Physiology, 2018;9:247. PMID: 29628895. https://pubmed.ncbi.nlm.nih.gov/29628895/ ↩ ↩² ↩³

24. Larsen S, Kristiansen E, van den Tillaar R. “Effects of subjective and objective autoregulation methods for intensity and volume on enhancing maximal strength during resistance-training interventions: a systematic review.” PeerJ, 2021;9:e10663. PMID: 33520457. https://pubmed.ncbi.nlm.nih.gov/33520457/ ↩

25. Helms ER, Cross MR, Brown SR, Storey A, Cronin J, Zourdos MC. “Rating of Perceived Exertion as a Method of Volume Autoregulation Within a Periodized Program.” Journal of Strength and Conditioning Research, 2018;32(6):1627-1636. PMID: 29786623. https://pubmed.ncbi.nlm.nih.gov/29786623/ ↩

26. Pelland JC, Remmert JF, Robinson ZP, Hinson SR, Zourdos MC. “The Resistance Training Dose Response: Meta-Regressions Exploring the Effects of Weekly Volume and Frequency on Muscle Hypertrophy and Strength Gains.” Sports Medicine, 2026;56(2):481-505. PMID: 41343037. https://pubmed.ncbi.nlm.nih.gov/41343037/ ↩ ↩²

27. Zourdos MC, Klemp A, Dolan C, Quiles JM, Schau KA, Jo E, Helms E, Esgro B, Duncan S, Garcia Merino S, Blanco R. “Novel Resistance Training-Specific Rating of Perceived Exertion Scale Measuring Repetitions in Reserve.” Journal of Strength and Conditioning Research, 2016;30(1):267-275. PMID: 26049792. https://pubmed.ncbi.nlm.nih.gov/26049792/ ↩ ↩²

28. Halperin I, Malleron T, Har-Nir I, Androulakis-Korakakis P, Wolf M, Fisher J, Steele J. “Accuracy in Predicting Repetitions to Task Failure in Resistance Exercise: A Scoping Review and Exploratory Meta-analysis.” Sports Medicine, 2022;52(2):377-390. PMID: 34542869. https://pubmed.ncbi.nlm.nih.gov/34542869/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶

29. Refalo MC, Remmert JF, Pelland JC, Robinson ZP, Zourdos MC, Hamilton DL, Fyfe JJ, Helms ER. “Accuracy of Intraset Repetitions-in-Reserve Predictions During the Bench Press Exercise in Resistance-Trained Male and Female Subjects.” Journal of Strength and Conditioning Research, 2024;38(3):e78-e85. PMID: 37967832. https://pubmed.ncbi.nlm.nih.gov/37967832/ ↩

30. RP Strength Help Center. “For those looking primarily to maximize strength as their primary objective we generally recommend the Juggernaut AI app.” Accessed October 3, 2026. https://help.rpstrength.com/hc/en-us/articles/33510008280087 ↩ ↩²

31. JuggernautAI. “JuggernautAI v2.0 Is Out Now.” “Apple Health & Google Health Connect integration”; “Pre-fill readiness questionnaires”; “New Bench Only Program”. https://www.juggernautai.app/blog/juggernautai-v2-0-is-out-now ; “New Program Alert - Strongman.” https://www.juggernautai.app/blog/new-program-alert---strongman . Accessed October 3, 2026. ↩ ↩² ↩³ ↩⁴

32. RP Strength Help Center. “Grow, Maintain, and Emphasize Progressions.” Emphasize “will add training volume whenever you are responding and recovering well, moving you from MEV (Minimum Effective Volume) up to MRV (Maximum Recoverable Volume)”; Grow is “keeping you closer to MEV”; Maintain “will keep you at MV (Maintenance Volume)”. Accessed October 3, 2026. https://help.rpstrength.com/hc/en-us/articles/34825395726743—Grow-Maintain-and-Emphasize-Progressions ↩ ↩² ↩³ ↩⁴

33. RP Strength. “Michael Israetel.” “doctorate in Sport Physiology from East Tennessee State University”; https://rpstrength.com/pages/team/michael-israetel ; team page lists “Michael Israetel PHD, Co-founder of RP Strength” and “Nick Shaw Founder of RP Strength”. https://rpstrength.com/pages/team ; Help Center, “Why is there no rest timer?”: “You won’t find a rest timer in the app, and that’s intentional.” https://help.rpstrength.com/hc/en-us/articles/30805293312407-Why-is-there-no-rest-timer . Accessed October 3, 2026. ↩ ↩²

34. Schoenfeld BJ, Ogborn D, Krieger JW. “Dose-response relationship between weekly resistance training volume and increases in muscle mass: A systematic review and meta-analysis.” Journal of Sports Sciences, 2017;35(11):1073-1082. PMID: 27433992. https://pubmed.ncbi.nlm.nih.gov/27433992/ ↩

35. Coleman M, Burke R, Augustin F, Piñero A, Maldonado J, Fisher JP, Israetel M, Androulakis Korakakis P, Swinton P, Oberlin D, Schoenfeld BJ. “Gaining more from doing less? The effects of a one-week deload period during supervised resistance training on muscular adaptations.” PeerJ, 2024;12:e16777. PMID: 38274324. https://pubmed.ncbi.nlm.nih.gov/38274324/ ↩

36. Alpha Progression. “Alpha Progression workout plan generator.” September 17, 2026 — “It chooses a training split, exercises, and set and rep targets”; splits “Full body, Upper-lower, Push-pull, Push-pull-legs, and PPL-upper-lower.” https://alphaprogression.com/en/blog/alpha-progression-workout-plan-generator ↩ ↩² ↩³

37. Refalo MC, Helms ER, Trexler ET, Hamilton DL, Fyfe JJ. “Influence of Resistance Training Proximity-to-Failure on Skeletal Muscle Hypertrophy: A Systematic Review with Meta-analysis.” Sports Medicine, 2023;53(3):649-665. PMID: 36334240. https://pubmed.ncbi.nlm.nih.gov/36334240/ ↩

38. Robinson ZP, Pelland JC, Remmert JF, Refalo MC, Jukic I, Steele J, Zourdos MC. “Exploring the Dose-Response Relationship Between Estimated Resistance Training Proximity to Failure, Strength Gain, and Muscle Hypertrophy: A Series of Meta-Regressions.” Sports Medicine, 2024;54(9):2209-2231. PMID: 38970765. https://pubmed.ncbi.nlm.nih.gov/38970765/ ↩ ↩²

39. Alpha Progression. “Alpha Progression guide.” September 10, 2026 — “Alpha Progression can connect to Apple Health on iPhone and Health Connect on Android”; “sync workouts (including calories burned), bodyweight, and body fat percentage”; “No. Alpha Progression currently does not have an import feature”; “export all workout, plan, and body measurement data in CSV format. CSV export is available in the free version”; “Alpha Progression currently contains 795 built-in exercises”; Apple Watch and Wear OS apps “on our roadmap”. https://alphaprogression.com/en/blog/alpha-progression-guide ; founder profile: “Benjamin Schnabel, Co-founder · BSA personal trainer”. https://alphaprogression.com/en/blog/authors/benjamin-schnabel ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹

40. Lyndsey Nuckols. “MacroFactor Annual Report 2026.” September 30, 2026 — “Beta is underway for MacroFactor Workouts on Apple Watch, and will soon be available for all users”; “Workouts also writes data directly to your linked Apple Health account”; 1,200 exercises; all Jeff Nippard programs sold on his website can be uploaded. https://macrofactor.com/annual-report-2026/ ; Apple Health integration release notes, February 8, 2026: https://macrofactor.com/wo-version-1-1-3/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸

41. MacroFactor. “Team.” “The MacroFactor executive team is made up of five co-equal owners: Greg Nuckols, Cory Davis, Rebecca Kekelishvili, Lyndsey Nuckols, and Jeff Nippard”; staff include “Dr. James Steele, PhD Head of Research” and “Dr. Zac Robinson, PhD Senior Research Scientist”. Accessed October 3, 2026. https://macrofactor.com/team/ ↩ ↩²

42. MacroFactor Help Center. “Integrations (Workouts).” “MacroFactor Workouts supports the following health platforms: Apple Health (iOS) Google Health Connect (Android)”; “Devices and apps, such as smartwatches or fitness trackers, will not connect directly to MacroFactor Workouts.” Accessed October 3, 2026. https://help.macrofactorapp.com/en/articles/354-integrations-workouts ↩ ↩²

43. RP Strength Help Center. “Importing/Exporting Data.” Updated September 24, 2026 — “While data cannot yet be imported into either the diet or hypertrophy apps, the ability to export training data is possible in the hypertrophy app.” https://help.rpstrength.com/hc/en-us/articles/43551864598423-Importing-Exporting-Data ↩ ↩² ↩³ ↩⁴

44. Addleman JS, Lackey NS, DeBlauw JA, Hajduczok AG. “Heart Rate Variability Applications in Strength and Conditioning: A Narrative Review.” Journal of Functional Morphology and Kinesiology, 2024;9(2):93. PMID: 38921629. https://pubmed.ncbi.nlm.nih.gov/38921629/ ↩

45. Craven J, McCartney D, Desbrow B, Sabapathy S, Bellinger P, Roberts L, Irwin C. “Effects of Acute Sleep Loss on Physical Performance: A Systematic and Meta-Analytical Review.” Sports Medicine, 2022;52(11):2669-2690. PMID: 35708888. https://pubmed.ncbi.nlm.nih.gov/35708888/ ↩

46. RP Strength Help Center. “RP Hypertrophy App: What’s new?” “Hypertrophy App 1.0.0 Released in iOS Platforms in US. - December 20, 2025”. Accessed October 3, 2026. https://help.rpstrength.com/hc/en-us/articles/34725726510999-RP-Hypertrophy-App-What-s-new ↩ ↩²