SmartGym vs Hevy vs Fitbod (2026): Price, AI and Apple Watch Compared

SmartGym is the gym app Apple keeps putting on stage. It was Apple Watch App of the Year in 2023, and in 2025 Apple’s newsroom used it to show off the Foundation Models framework.¹² On the App Store it holds 4.7 stars from 34K ratings and an Editors’ Choice badge.³

People who find SmartGym usually ask the same thing next: is it better than Hevy or Fitbod? Those three apps make three different bets. Hevy is a logger you steer. Fitbod generates your workouts for you. SmartGym sits in between: you can build and log routines yourself, or let its Smart Trainer write and adjust them.

Every price, limit and feature below was checked against each app’s US App Store listing and the developers’ own pages on 29 September 2026.

SmartGym vs Hevy vs Fitbod: the short answer

SmartGym ($59.99/yr) is the Apple-only choice, with an on-device AI Smart Trainer and a standalone Apple Watch app. Hevy ($23.99/yr, or free) is the cheapest logger and runs on Android. Fitbod ($95.99/yr) costs the most and generates every workout for you. Pick by who you want writing the program.³⁴⁵

	SmartGym	Hevy	Fitbod	SensAI
What it is	Workout builder and logger with an AI Smart Trainer	Workout logger with a social feed	Algorithm that generates each workout	Conversational AI coach
Who writes the program	You, or Smart Trainer6	You, or the Pro-only Hevy Trainer7	Fitbod’s AI4	SensAI’s Coach, in conversation8
Standard paid plan (US)	Premium+ $9.99/mo or $59.99/yr3	Pro $2.99/mo, $23.99/yr or $74.99 lifetime5	$15.99/mo or $95.99/yr4	$6.99/mo or $69.99/yr8
Free option	2 routines, 3 workouts, 2 measures3	Free forever with limits5	Free trial, then subscription4	7-day free trial8
Android	No3	Yes9	Yes9	No8
Apple Watch	Standalone app, no iPhone needed3	Yes5	Yes4	Yes8
How it adapts	Logged performance, muscle recovery, progression curves10	Trainer raises weight when you hit the top of the rep range7 (Pro)	Logged performance4	Your messages plus Apple Health data811
App Store rating	4.7 from 34K3	4.9 from 95K5	4.8 from 286K4	4.6 from 348

Prices and ratings from the US App Store, 29 September 2026. All three list more than one price for some plans, including older plans, so check the checkout screen on your own device.

How much does SmartGym cost compared with Hevy and Fitbod?

SmartGym Premium+ costs $9.99 a month or $59.99 a year on the US App Store. That is $36 a year less than Fitbod’s $95.99 and $36 more than Hevy Pro’s $23.99. Only Hevy lists a lifetime plan ($74.99), and only SmartGym lists a family plan.³⁴⁵

Plan	SmartGym	Hevy	Fitbod
Monthly	$9.99, Premium+3	$2.99 or $3.995	$15.99 or $12.994
Yearly	$59.99, Premium+3	$23.995	$95.99 or $79.994
Lifetime	Not listed	$74.995	Not listed
Family	$16.99/mo or $99.99/yr3	Not listed	Not listed
Coaches	Manage 10 Students, $14.99/mo or $124.99/yr3	Not listed	Not listed

SmartGym’s listing also shows older plans: SG Premium $39.99, a Legacy Plan at $29.99 and a User Account plan at $6.99 a month or $39.99 a year.³ These look like plans kept for existing subscribers. New users should expect Premium+.

What do they cost over one and three years?

On yearly plans, SmartGym costs $59.99 for one year and $179.97 for three. Hevy costs $23.99 and $71.97, or $74.99 once for lifetime. Fitbod costs $95.99 and $287.97. Over three years, Fitbod costs $108 more than SmartGym, and SmartGym costs about $105 more than Hevy’s lifetime plan.³⁴⁵

App	1 year (yearly plan)	3 years (yearly plan)	12 months paid monthly
Hevy Pro	$23.99	$71.97 (or $74.99 lifetime)	$35.88
SmartGym Premium+	$59.99	$179.97	$119.88
SensAI Premium	$69.99	$209.97	$83.88
Fitbod	$95.99	$287.97	$191.88

Computed from US App Store list prices on 29 September 2026. Hevy’s monthly figure uses its $2.99 price and Fitbod’s uses $15.99. Taxes and regional pricing not included.

Is SmartGym free?

SmartGym is free to download and does not need an account. The free version gives you 2 routines, 3 workouts and 2 measures. Premium+ unlocks the rest, and new subscribers get a 7-day free trial first. Hevy’s free tier is broader, and Fitbod has no free tier beyond its trial.³¹⁰⁵⁴

The App Store listing states the limit plainly: “The free version of SmartGym gives access to 2 routines, 3 workouts and 2 measures.”³ SmartGym’s site adds that it is “Free to download. No account required,” and that “New subscribers get a 7-day free trial, giving you complete, unrestricted access before your plan kicks in.”⁶¹⁰

Three workouts is enough to try the logging screen and the Watch app, not enough to judge the Smart Trainer. The Smart Trainer adapts over many sessions, so use the trial week to train with it, not just to browse.

How does SmartGym’s Smart Trainer work?

Smart Trainer builds a program from your goals, equipment and schedule. After each session it adjusts weights, reps and exercises based on what you actually did. When your data shows a plateau, the end of a training block or a change of goal, it rewrites the whole program. SmartGym says it follows NSCA and ACSM periodization.⁶¹⁰

SmartGym describes the loop in its own words: “Finish a session, and it learns, adjusting weights, reps, and exercises based on your actual performance.”⁶ Its FAQ says the Smart Trainer “analyzes your workout history, tracks your progression curves, and understands muscle group recovery, training volume, and progressive overload.”¹⁰

There are two speeds of change:

• After every workout: “more weight, more reps, an exercise swap if something isn’t working.”⁶
• At the right moment: “a plateau, the end of a training block, a shift in your goals,” after which Smart Trainer “rewrites your entire program with brand new routines.”¹⁰

Since version 7.7 in September 2025, SmartGym uses Apple’s Foundation Models framework. You can describe a workout in plain words and it builds a routine with sets, reps and rest times.¹²² Apple’s newsroom said the Smart Trainer “now explains why each change is suggested.”²

Does SmartGym’s AI run on your phone?

Mostly, yes. SmartGym says its workout builder “runs on-device for complete privacy,” using Apple’s Foundation Models framework. Version 8.0, released in September 2026 for iOS 27, added an opt-in private cloud intelligence option that is off by default. You choose whether anything leaves the device.⁶³

SmartGym’s CEO, Matt Abras, told Apple: “The Foundation Models framework enables us to deliver on-device features that were once impossible.”² Version 8.0 added natural-language workout creation on both iPhone and Apple Watch, Siri with on-screen awareness and improved Exercise Questions, which answers questions about how to perform a movement.³

What does SmartGym mean by “recovery”?

In SmartGym, recovery means muscle-group recovery worked out from your training, not a readiness score from your watch. It reads workouts from any app that writes to Apple Health, including Apple Fitness+, and counts them. SmartGym does not say it uses HRV or sleep to set your weights.⁶¹⁰

This matters if you also do cardio. SmartGym “tracks workouts from any app that writes to Apple Health, including Apple Fitness+, the built-in Apple Watch Workout app, and other third-party fitness apps.”⁶ A long run logged in another app can therefore count against your leg recovery.

Is SmartGym’s approach backed by research?

The ideas are well supported. Planned, periodized training beat unplanned training for strength in a 35-study meta-analysis, and a 2022 review warned that random exercise variation may compromise gains. Effort-based adjustment matches fixed percentages. No study has tested SmartGym, Hevy or Fitbod themselves, so the research supports the methods, not the apps.^13141516

Method	What the research found	Study
Periodization (SmartGym)	Periodized training beat non-periodized training for 1RM strength (ES 0.31, 95% CI 0.04–0.57), with no difference in muscle growth (ES 0.13)	Moesgaard et al., 2022, 35 studies13
Planned exercise variation (SmartGym)	Systematic variation may help regional growth and strength; “excessive, random variation may compromise muscular gains”	Kassiano et al., 2022, 8 studies, 241 young men14
Adding reps, then weight (Hevy Trainer)	Rep progression and load progression gave similar muscle and strength gains over 8 weeks	Plotkin et al., 2022, 43 trained adults17
Adjusting by effort	Both worked; effort-based loading “may provide a small 1RM strength advantage in a majority of individuals”	Helms et al., 2018, 21 trained men15
Load autoregulation	No significant 1RM difference from standardized loading (mean difference 2.07 kg, p = 0.09)	Hickmott et al., 2022, 6 of 15 studies16

Planned change beats random change

SmartGym’s site quotes a 2022 review it credits to “Schoenfeld and colleagues”: “excessive, random variation may compromise muscular gains.”⁶ That review was led by Witalo Kassiano. Brad Schoenfeld, of Lehman College, City University of New York, was a co-author. The review found systematic variation “seems to enhance regional hypertrophic adaptations and maximize dynamic strength.”¹⁴

That supports SmartGym’s model of steady progress, then a full rewrite at the end of a block. It also warns against apps that shuffle exercises every session for novelty.

A 2022 meta-analysis by Moesgaard and colleagues supports the periodization claim, with limits. Periodized programs beat non-periodized ones for strength, not muscle size. Undulating programs beat linear ones for strength only in trained lifters.¹³ If your goal is size, the plan matters less than doing enough work.

Hevy Trainer uses double progression

Hevy’s Pro-only Trainer adds weight only when you earn it: “You must hit the upper end of the rep range with a specific weight on all prescribed sets for Trainer to increase it.”⁷ This is double progression, so the research on adding reps applies. In the 2022 Plotkin trial, lifters who added reps at a fixed load grew and got stronger about as much as those who added load.¹⁷

Effort ratings work, and get better with practice

Eric Helms, of the Sport Performance Research Institute New Zealand at Auckland University of Technology, compared effort-based loading with fixed percentages of 1RM in trained men. Both groups improved, and the effort group had a small strength edge in most individuals.¹⁵ A 2022 meta-analysis found autoregulated and standardized loading “produced similar improvements in strength.”¹⁶

Michael Zourdos’s lab at Florida Atlantic University developed the reps-in-reserve scale that most effort ratings build on. It found experienced squatters rated a true max as harder than novices did, so their ratings sat closer to their real limit.¹⁸ If you are new, any app that adjusts from your effort ratings will need a few weeks to calibrate.

Volume matters more than which app you choose

A 2017 meta-analysis found each extra weekly set was linked to a 0.37% larger gain in muscle size.¹⁹ A 2026 meta-regression from Zourdos’s lab, covering 67 studies and 2,058 participants, found size and strength both rise with volume, with diminishing returns that are “considerably more pronounced” for strength.²⁰ Our guide to training volume per muscle covers the numbers.

SmartGym vs Hevy: which is better?

Choose Hevy if you write your own program and want the lowest price, Android support or a social feed: Pro is $23.99 a year and the free tier is usable. Choose SmartGym if you are all-in on Apple and want an AI to plan and adjust your routines, with a Watch app that works without your phone.⁵³⁶

	SmartGym	Hevy
Yearly price	$59.993	$23.99, or $74.99 lifetime5
Free tier	2 routines, 3 workouts3	Free forever with limits5
Program planning	Smart Trainer, plus your own routines6	You, or Pro-only Trainer7
Platforms	iPhone, iPad, Mac, Apple Watch, Vision Pro3	iPhone, iPad, Apple Watch, Android59
Social	SharePlay workouts3	Community feed, “+10 million users”5
AI extras	On-device workout builder, Siri36	Send workouts to ChatGPT or Claude, v3.1.155

Hevy’s pitch is size and simplicity. It says it has over 10 million users, and its newest version, 3.1.15 from 21 September 2026, lets you send workouts to ChatGPT or Claude.⁵ Our Hevy review covers the logger in detail.

SmartGym’s edge is the Apple ecosystem. Its Watch app is standalone: “No need to use the iPhone with you.”³ It also reads heart rate from Powerbeats Pro 2 or AirPods Pro 3 for live heart-rate zones.⁶ If you train with an Android phone, SmartGym is not an option.

SmartGym vs Fitbod: which is better?

Both apps plan your workouts for you. SmartGym costs $36 a year less ($59.99 vs $95.99), runs its AI on-device and has a standalone Apple Watch app. Fitbod has far more ratings (286K vs 34K) and runs on Android. On Apple devices, SmartGym gives you a similar AI planner for less money.³⁴

	SmartGym	Fitbod
Yearly price	$59.993	$95.99 or $79.994
Free option	Limited free version, 7-day trial310	Free trial4
Android	No3	Yes9
Minimum iOS	iOS 15.03	iOS 18.04
Explains its choices	Yes, per Apple2	“AI-generated recommendations”4
Ratings	4.7 from 34K3	4.8 from 286K4

Fitbod describes “personalized AI workouts” and “AI-generated recommendations.”⁴ SmartGym publishes more of its method, naming NSCA and ACSM periodization and the research it follows.¹⁰⁶ Our Fitbod review covers how Fitbod builds a session, and our Fitbod alternatives guide ranks the wider field.

How do the options compare, including SensAI?

SmartGym suits Apple users who want an AI planner. Hevy ($23.99/yr, or free) suits self-directed lifters. Fitbod ($95.99/yr) suits people who want every workout generated, on any phone. SensAI ($69.99/yr) suits people who want a conversational coach that uses their Apple Health data.³⁵⁴⁸

App	Approach	Yearly price (US)	Free option	Android
SmartGym	Builder and logger with AI Smart Trainer	$59.993	2 routines, 3 workouts3	No3
Hevy	Logger; optional Pro Trainer	$23.995	Yes, with limits5	Yes9
Fitbod	AI-generated workouts	$95.994	Free trial4	Yes9
Gravl	Algorithm plans each session from estimated 1RM	$59.99–$89.99	3 workouts	Yes
SensAI	Conversational AI coach using Apple Health data	$69.998	7-day trial8	No8

Gravl figures are from our Gravl app review, checked 28 September 2026.

Where SmartGym beats SensAI

SmartGym does several things SensAI does not. It runs on iPad, Mac and Vision Pro as well as iPhone and Apple Watch, and it works on iOS 15, while SensAI needs iOS 26 or later.³⁸ It has a library of more than 730 exercises, a family plan and a coach plan for managing clients.³ Its yearly price, $59.99, is also $10 below SensAI’s $69.99.³⁸

Where SensAI is different

SensAI is a coach you talk to, rather than an app you steer with logs and settings.⁸ You can tell it “I tweaked my shoulder - adjust my week” and it rewrites the plan.⁸ It reads Apple Health only: your watch or ring app writes to Apple Health, and SensAI reads from there.¹¹ Apple Watch is the only device on SensAI’s list that shares HRV. Garmin’s Body Battery and WHOOP’s Recovery and Strain stay in their own apps.¹¹ 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.”¹¹ To see what your device shares, read how to connect a wearable to SensAI through Apple Health.

Which devices do SmartGym, Hevy and Fitbod support?

SmartGym runs only on Apple devices: iPhone, iPad, Mac, Apple Watch and Vision Pro, from iOS 15 and watchOS 9. Hevy and Fitbod both run on iPhone, Apple Watch and Android. Fitbod needs iOS 18 or later. All three connect to Apple Health, and SmartGym also syncs to Strava.³⁴⁵⁹¹²

	SmartGym	Hevy	Fitbod
iPhone	iOS 15.0+3	iOS 15.1+5	iOS 18.0+4
Apple Watch	watchOS 9.0+, standalone3	watchOS 8.0+5	watchOS 10.0+4
Android	No3	Yes9	Yes9
Strava	Auto-sync, including from the Watch12	See what syncs with Strava	See what syncs with Strava

SmartGym also runs on iPad, Mac and Vision Pro, reads heart rate from Powerbeats Pro 2 or AirPods Pro 3, and ships in English, French, German, Italian, Portuguese and Spanish.³⁶

Requirements from each US App Store listing, 29 September 2026.

What changed in SmartGym in 2025 and 2026?

SmartGym added Foundation Models AI in September 2025, then Strava sync and tracking of workouts from other apps in February 2026. Version 7.10 in April 2026 added custom heart-rate zones. Version 8.0 in September 2026 added natural-language workout creation on the Watch and opt-in private cloud intelligence.¹²³

Date	Version	What changed
Nov 2023	—	Apple Watch App of the Year1
15 May 2025	7.6	Heart rate from Powerbeats Pro 2; heart-rate zones12
3 Sep 2025	7.7	Foundation Models, Live Workout Builder, Liquid Glass12
12 Feb 2026	7.8	Tracks workouts from other apps; Strava sync12
19 Mar 2026	7.9	Stretch suggestions; training load12
27 Apr 2026	7.10	Workout Summary, Routine Progress, custom heart-rate zones; Smart Trainer uses custom exercises3
23 Jul 2026	7.11	One-set-at-a-time logging, Smart Action Button3
14 Sep 2026	8.0	iOS 27: opt-in private cloud intelligence, natural-language workouts on iPhone and Watch, Siri with on-screen awareness, improved Exercise Questions3

For comparison, Fitbod’s latest App Store version is 8.34.0 (16 September 2026) and Hevy’s is 3.1.15 (21 September 2026).⁴⁵

SmartGym review: which app should you choose?

Choose SmartGym if you use only Apple devices and want an AI to plan your training at a mid-range price. Choose Hevy if you want to write your own program for the least money, or you use Android. Choose Fitbod if you want every workout generated and need Android. Choose SensAI if you want to talk your training through.³⁵⁴⁸

SmartGym is a good fit if you:

• Use an iPhone and Apple Watch, and want to leave the phone in your locker
• Want a planner that adjusts after every session and rewrites the program at a plateau
• Care that the AI runs on your device
• Want one subscription for your family ($99.99 a year)

Look elsewhere if you:

• Use Android (Hevy or Fitbod)
• Want the cheapest option, or a lifetime plan (Hevy)
• Already follow a program and only need a logger (Hevy; see Hevy vs Fitbod)
• Want training to respond to your sleep and HRV from Apple Watch, or to plain-language requests (SensAI)

Frequently asked questions

Is SmartGym better than Hevy?

It depends on who writes your program. SmartGym is better if you want an AI to plan and adjust routines on Apple devices. Hevy is better if you write your own program, want the lowest price ($23.99 a year or $74.99 lifetime) or use Android.³⁵

Is SmartGym better than Fitbod?

On Apple devices, SmartGym costs less for a similar AI planner: $59.99 a year against Fitbod’s $95.99, with a standalone Watch app and on-device AI. Fitbod is the pick if you need Android or want the larger user base behind its 286K ratings.³⁴

Is SmartGym free?

Partly. SmartGym is free to download and needs no account. The free version gives you 2 routines, 3 workouts and 2 measures. New subscribers get a 7-day free trial of Premium+.³¹⁰

How much does SmartGym cost?

SmartGym Premium+ costs $9.99 a month or $59.99 a year in the US. A family plan costs $16.99 a month or $99.99 a year. A plan for coaches managing 10 students costs $14.99 a month or $124.99 a year.³

Does SmartGym use AI?

Yes. Its Smart Trainer builds programs and adjusts weights, reps and exercises after each session. Since September 2025 it has used Apple’s Foundation Models framework to turn a described workout into a routine, and SmartGym says this runs on-device.⁶²

Does SmartGym work without an iPhone?

Its Apple Watch app is standalone, so you can train from the Watch alone. SmartGym also works on iPhone alone, reading heart rate from Powerbeats Pro 2 or AirPods Pro 3.³⁶

Is SmartGym available on Android?

No. SmartGym runs on iPhone, iPad, Mac, Apple Watch and Vision Pro only. Hevy and Fitbod both have Android apps.³⁹

Does SmartGym sync with Strava and Apple Health?

Yes. SmartGym syncs workouts to Strava automatically, including from the Watch. It also reads workouts from any app that writes to Apple Health, including Apple Fitness+.¹²⁶

Is SmartGym good for beginners?

Yes. Smart Trainer builds a starting program from your goals, equipment and schedule, so you do not need to know how to write one. It learns from each logged session, so its adjustments improve the longer you train with it consistently.⁶¹⁰

The bottom line

SmartGym is the strongest Apple-only option: an AI Smart Trainer, a standalone Watch app and on-device privacy for $59.99 a year, between Hevy’s $23.99 and Fitbod’s $95.99. Choose Hevy to write your own program cheaply, Fitbod for generated workouts on Android, and SensAI to talk your training through.³⁵⁴⁸

SmartGym’s best feature is that it plans in blocks. It progresses you session by session, then rewrites the program when you stall, which matches what the periodization research supports.¹⁰¹³¹⁴

Its limits come from being a rule system. It adapts to what you log, not to how you slept or what you tell it about your week. If that matters to you, a conversational coach like SensAI fits better. If you train on Apple devices and want the app to handle planning, SmartGym does it well, for less than Fitbod.

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References

Footnotes

1. Apple Newsroom. “Apple unveils App Store Award winners, the best apps and games of 2023.” November 2023 — Apple Watch App of the Year: SmartGym (Mateus Abras). https://www.apple.com/newsroom/2023/11/apple-unveils-app-store-award-winners-the-best-apps-and-games-of-2023/ ↩ ↩²

2. Apple Newsroom. “Apple’s Foundation Models framework unlocks new intelligent app experiences.” September 2025 — SmartGym turns a described workout into a structured routine; Smart Trainer “now explains why each change is suggested”; Matt Abras, CEO: “The Foundation Models framework enables us to deliver on-device features that were once impossible.” https://www.apple.com/newsroom/2025/09/apples-foundation-models-framework-unlocks-new-intelligent-app-experiences/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶

3. SmartGym Services LLC. “SmartGym: Gym & Home Workouts — HIIT, Home, Gym Weight Lifting.” Apple App Store listing (id922744883) — in-app purchases SmartGym Premium+ Monthly $9.99, SmartGym Premium+ Yearly $59.99, Family Premium+ Monthly $16.99, Family Premium+ Yearly $99.99, Manage 10 Students Monthly $14.99 and Yearly $124.99, SG Premium $39.99, Legacy Plan $29.99, User Account Monthly $6.99 and Yearly $39.99; “The free version of SmartGym gives access to 2 routines, 3 workouts and 2 measures”; “Smart Trainer: Artificial Intelligence able to create personalized workouts that can be done at home or at the gym”; “Standalone Watch app. No need to use the iPhone with you.”; SharePlay; languages English, French, German, Italian, Portuguese, Spanish; requires iOS 15.0, iPadOS 15.0, macOS 12.0, watchOS 9.0, visionOS 1.0; Editors’ Choice; 4.7 rating from 34K ratings; version history 7.10 (April 27, 2026), 7.11 (July 23, 2026), 8.0 to 8.0.3 (September 14–16, 2026). Accessed September 29, 2026. https://apps.apple.com/us/app/smartgym-gym-home-workouts/id922744883 ↩ ↩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 ↩³² ↩³³ ↩³⁴ ↩³⁵ ↩³⁶ ↩³⁷ ↩³⁸ ↩³⁹ ↩⁴⁰ ↩⁴¹ ↩⁴² ↩⁴³ ↩⁴⁴ ↩⁴⁵ ↩⁴⁶ ↩⁴⁷ ↩⁴⁸ ↩⁴⁹ ↩⁵⁰ ↩⁵¹ ↩⁵² ↩⁵³ ↩⁵⁴ ↩⁵⁵

4. Fitbod, Inc. “Fitbod: Gym & Fitness Planner.” Apple App Store listing (id1041517543) — Monthly Plan $15.99 and $12.99, A Year of Fitbod Elite $95.99 and $79.99, legacy SKUs; “personalized AI workouts” and “AI-generated recommendations”; auto-renewing subscription after free trial; requires iOS 18.0 and watchOS 10.0; version 8.34.0 (September 16, 2026); Editors’ Choice; 4.8 rating from 286K ratings. Accessed September 29, 2026. https://apps.apple.com/us/app/fitbod-gym-fitness-planner/id1041517543 ↩ ↩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

5. Hevy Studios S.L. “Hevy - Workout Tracker Gym Log.” Apple App Store listing (id1458862350) — Hevy Pro $2.99 and $3.99 monthly, $23.99 yearly, $74.99 lifetime; free to use; “Join +10 million users!”; community feed; iPhone, iPad and Apple Watch; requires iOS 15.1 and watchOS 8.0; version 3.1.15 (September 21, 2026) adds sending workouts to ChatGPT and Claude; 4.9 rating from 95K ratings. Accessed September 29, 2026. https://apps.apple.com/us/app/hevy-workout-tracker-gym-log/id1458862350 ↩ ↩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

6. SmartGym. “SmartGym Features — AI Workouts, 730+ Exercises, Heart Rate Zones, Strava & More.” “Finish a session, and it learns, adjusting weights, reps, and exercises based on your actual performance”; “more weight, more reps, an exercise swap if something isn’t working”; workout builder “runs on-device for complete privacy”; “tracks workouts from any app that writes to Apple Health, including Apple Fitness+”; heart rate from Powerbeats Pro 2 or AirPods Pro 3; “Free to download. No account required.”; quotes “excessive, random variation may compromise muscular gains.” Accessed September 29, 2026. https://smartgymapp.com/features ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹

7. Hevy Studios. “Hevy Trainer: Adaptive Strength Programming System.” “No, Trainer is a Pro feature”; “automatically adjusts your working weights”; “You must hit the upper end of the rep range with a specific weight on all prescribed sets for Trainer to increase it.” Accessed September 29, 2026. https://www.hevyapp.com/features/workout-plan-generator/ ↩ ↩² ↩³ ↩⁴

8. Origami, Inc. “SensAI: Fitness Sensei.” Apple App Store listing (id6738963099) — SensAI Premium $6.99 monthly, $69.99 yearly; “Try free for 7 days”; requires iOS 26 and watchOS 26; iPhone and Apple Watch; conversational Coach (“I tweaked my shoulder - adjust my week”); 4.6 rating from 34 ratings. Accessed September 29, 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

9. Google Play listings checked September 29, 2026: Fitbod https://play.google.com/store/apps/details?id=com.fitbod.fitbod ; Hevy https://play.google.com/store/apps/details?id=com.hevy ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰

10. SmartGym. Homepage and FAQ. Smart Trainer “analyzes your workout history, tracks your progression curves, and understands muscle group recovery, training volume, and progressive overload”; “follows the periodization model recommended by the NSCA and ACSM”; rewrites the program at “a plateau, the end of a training block, a shift in your goals”; “New subscribers get a 7-day free trial”; awards Apple Watch App of the Year 2023 and Apple Design Award Finalist 2024. Accessed September 29, 2026. https://smartgymapp.com/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹²

11. 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; Garmin HRV, Body Battery and Training Readiness stay in Garmin; WHOOP HRV, Recovery and Strain stay in WHOOP; “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

12. SmartGym. “What’s new” release notes — 7.6 (May 15, 2025): heart rate from Powerbeats Pro 2, heart-rate zones; 7.7 (September 3, 2025): Foundation Models, Live Workout Builder, Liquid Glass; 7.8 (February 12, 2026): third-party workout tracking, Strava sync; 7.9 (March 19, 2026): stretch suggestions, training load. Accessed September 29, 2026. https://smartgymapp.com/releases/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹

13. Moesgaard L, Beck MM, Christiansen L, Aagaard P, Lundbye-Jensen J. “Effects of Periodization on Strength and Muscle Hypertrophy in Volume-Equated Resistance Training Programs: A Systematic Review and Meta-analysis.” Sports Medicine, 2022;52(7):1647-1666. PMID: 35044672. https://pubmed.ncbi.nlm.nih.gov/35044672/ ↩ ↩² ↩³ ↩⁴

14. Kassiano W, Nunes JP, Costa B, Ribeiro AS, Schoenfeld BJ, Cyrino ES. “Does Varying Resistance Exercises Promote Superior Muscle Hypertrophy and Strength Gains? A Systematic Review.” Journal of Strength and Conditioning Research, 2022;36(6):1753-1762. PMID: 35438660. https://pubmed.ncbi.nlm.nih.gov/35438660/ ↩ ↩² ↩³ ↩⁴

15. 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

16. Hickmott LM, Chilibeck PD, Shaw KA, Butcher SJ. “The Effect of Load and Volume Autoregulation on Muscular Strength and Hypertrophy: A Systematic Review and Meta-Analysis.” Sports Medicine - Open, 2022;8(1):9. PMID: 35038063. https://pubmed.ncbi.nlm.nih.gov/35038063/ ↩ ↩² ↩³

17. Plotkin D, Coleman M, Van Every D, Maldonado J, Oberlin D, Israetel M, Feather J, Alto A, Vigotsky AD, Schoenfeld BJ. “Progressive overload without progressing load? The effects of load or repetition progression on muscular adaptations.” PeerJ, 2022;10:e14142. PMID: 36199287. https://pubmed.ncbi.nlm.nih.gov/36199287/ ↩ ↩²

18. 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/ ↩

19. 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/ ↩

20. 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/ ↩