Freeletics vs BetterMe vs Fitify (2026): Price, AI and Results Compared

Freeletics, BetterMe and Fitify are three of the most-downloaded home-workout apps, with 10M+ Google Play installs each. BetterMe alone holds 713K ratings in the US. Freeletics carries Apple’s Editors’ Choice badge, and Fitify has the highest average rating of the three at 4.9 stars.¹²³

All three promise a plan built around you, but each means something different by that. Freeletics adjusts your next session from the feedback you give after the last one. BetterMe builds a program from a sign-up quiz and adds meal plans. Fitify says its AI Coach runs on OpenAI’s GPT-5.¹⁴⁵

Every price, limit and feature below was checked against each app’s US App Store listing and the developers’ own pages on 30 September 2026.

Freeletics vs BetterMe vs Fitify: the short answer

Freeletics suits bodyweight HIIT and strength with a Coach that adapts to your feedback. BetterMe suits weight loss, pairing 4,000+ workouts with meal plans, but its many subscription prices need care. Fitify ($69.99/yr) suits short home workouts with an AI Coach. Only Freeletics has been studied in peer-reviewed research.¹²³⁶

	Freeletics	BetterMe	Fitify	SensAI
What it is	Bodyweight and gym training with an adaptive Coach	Weight-loss and well-being app with workouts, meal plans and trackers	Short home workouts with an AI Coach	Conversational AI coach
How the plan is built	Coach adjusts “in real time based on your feedback”1	From “your quiz answers”7	AI Coach plus your logged weights35	In conversation with Coach8
US App Store prices	Training Coach $34.99–$79.99; Training and Nutrition $49.99–$89.991	Ten products, $4.99–$41.992	Pro $69.99/yr; monthly $6.49–$14.993	$6.99/mo or $69.99/yr8
Free option	34 HIIT bodyweight workouts, 100+ exercises1	No free tier described by BetterMe	“Selected workouts”3	7-day free trial8
Nutrition	Separate app or bundle1	20+ meal plans, calorie tracker7	Recipes; separate Nutria app5	Meal-photo feedback; no meal plans8
Android	Yes1	Yes2	Yes3	No8
App Store rating	4.6 from 22K; Editors’ Choice1	4.7 from 713K2	4.9 from 12K3	4.6 from 358

Prices and ratings from the US App Store, 30 September 2026. The App Store lists several prices for each app without naming the plan length for every one, so check the checkout screen on your own device.

How much do Freeletics, BetterMe and Fitify cost?

Fitify is the easiest to price: Fitify Pro is $69.99 a year. Freeletics lists six Training Coach plans at four prices from $34.99 to $79.99, across 3-, 6- and 12-month plans. BetterMe lists ten products from a $4.99 weekly plan to $41.99, and its discounted offers renew at full price.¹²³⁹

In-app purchase (US)	Freeletics	BetterMe	Fitify
Lowest listed price	$34.99 (Training Coach1)	$4.99 (weekly2)	$6.49 (Pro monthly3)
Highest listed price	$89.99 (Training and Nutrition1)	$41.992	$69.99 (yearly3)
Yearly plan	Part of the Training Coach range; plan lengths are 3, 6 and 12 months1	$19.99 and $29.99 listed as “Annual”2	$69.993
Weekly plan	No	$4.99 and $9.992	No
Refund promise	“14-day money-back guarantee”1	Web refunds “at our own discretion”9	Fees “final and non-refundable”3

Why do these apps list so many prices?

Subscription apps often keep older plans, introductory offers and regional tests live on the same listing. The App Store shows all of them in one list, so a single number rarely tells you what you will pay.

BetterMe is the one to read carefully. Its subscription terms say discounted offers “renew at the full not discounted price”. They also say “deleting the app does not cancel your subscriptions” and “canceling one plan does not cancel the others”.⁹ Before you start a trial, note the renewal price on the checkout screen and set a reminder for the day before it renews.

For a wider view of how fitness apps price their plans, see our fitness app pricing and free tier comparison.

Is Freeletics, BetterMe or Fitify free?

Freeletics has the most clearly defined free tier: 34 HIIT bodyweight workouts and 100+ exercises, with no Coach. Fitify is free to download with “selected workouts” and charges for plans and the AI trainer. BetterMe’s own pages describe no free tier.¹²³

Freeletics says its free version gives you “many of our top signature workouts” plus a library of exercises, runs and audio sessions. The paid Coach adds the personalized plan.¹

Fitify is free to download and “includes access to selected workouts”. Fitify Pro adds “personalized training plans, AI personal trainer, and a wider range of workouts.”³

BetterMe’s App Store listing, help center and subscription terms describe paid plans and trials, but no free tier.²⁷⁹

If you want free workouts with no subscription at all, our best home workout apps with no equipment guide lists more options.

How does each app personalize your workouts?

Freeletics’ Coach changes your next session based on the effort and completion feedback you give after each workout. BetterMe builds a program from a sign-up quiz about your goals and habits. Fitify’s AI Coach runs on GPT-5 and uses your logged gym weights to build the next workout.¹⁴⁷⁵

Freeletics: a Coach that reads your feedback

Freeletics says its AI Coach “customizes each workout to your fitness level, adjusting in real time based on your feedback”. It draws on 700+ exercises and 30 fitness plans.¹ Its help center is plain about what the Coach is: “not a real person”, but “a digital program that uses the state of the art artificial intelligence to adjust your training plan”.⁴

Workouts run 15 to 45 minutes, and many need no equipment.¹ Freeletics also programs gym and home equipment, and in 2025 its Decathlon partnership added 17 new equipment options, including gym machines, and over 300 new exercises.¹⁰

BetterMe review: a plan from your quiz

BetterMe builds your program “based on your quiz answers, considering your lifestyle, habits, fitness level, and goals”.⁷ Its App Store listing makes no AI claim for workouts. The AI feature in its help center is a food scanner in the calorie tracker.²⁷

BetterMe is broader than the other two. It lists more than 4,000 home workouts across Pilates, calisthenics, strength, yoga and walking. It adds 20+ meal plans, intermittent fasting, and water and step trackers, and sells its own fitness tracker and smart scale.²⁷

Fitify: an AI Coach built on GPT-5

In August 2025, Fitify said its “AI Coach now runs on OpenAI’s latest GPT-5 model”, which it calls a “24/7 personal trainer who knows your training plan, your progress, and your preferences”. The Coach takes voice chat and photos, and offers “injury-friendly modifications”.⁵

Fitify says it has over 900 exercises and workouts of 15 to 25 minutes. They use bodyweight or kit such as kettlebells, TRX, resistance bands, dumbbells and a pull-up bar.³ Recent release notes say “gym weight logs are used when Fitify builds your next workout”.³

Does the research back these apps?

No trial has tested Freeletics, BetterMe or Fitify against a control group. Their methods are well supported, though: bodyweight training builds strength, short HIIT raises fitness, and effort ratings are a valid way to steer training. Freeletics is the only one of the three with peer-reviewed studies.^111261314

Bodyweight training builds strength

In an 8-week trial by Kikuchi and Nakazato at Nippon Sport Science University, push-ups raised bench-press 1RM from 61.1 to 64.2 kg. A matched low-load bench press group rose from 60.0 to 65.0 kg. The authors concluded push-ups were “comparably effective” for muscle and strength.¹¹ That supports the bodyweight core of Freeletics and Fitify.

Short HIIT sessions raise fitness

A 2024 umbrella review pooled 24 systematic reviews with 12,967 participants. HIIT raised cardiorespiratory fitness by 3.25 to 5.5 mL/kg/min compared with no exercise, including home-based and whole-body HIIT.¹² Martin Gibala, a kinesiologist at McMaster University and a co-author, has also shown that three brief stair-climbing “snacks” a day modestly improved fitness in sedentary young adults.¹⁵ The 15-to-25-minute sessions these apps sell are enough to count.

Effort ratings are a valid way to steer training

Freeletics steers your plan from how hard each session felt. A review of 36 validation studies found the session-RPE method has “validity and good reliability” as a stand-alone training-load measure.¹³ A 2022 meta-analysis found that adjusting load by effort or bar speed (six studies) produced similar strength gains to fixed-percentage plans in trained lifters.¹⁴ Effort feedback is a sound method, but it has not been shown to be a better one than a fixed plan.

Fitness apps help, modestly

A 2021 meta-analysis of 28 trials with 7,454 people found apps and activity trackers added about 1,850 steps a day. Personalized interventions worked better.¹⁶ Lead author Liliana Laranjo, of the University of Sydney’s Westmead Applied Research Centre, and colleagues noted that longer studies are needed to show which features keep people engaged and active over the long term.¹⁶

Diet plus exercise beats exercise alone for weight loss

BetterMe’s case rests on combining workouts with meal plans. A meta-analysis of 8 trials found combined programs cut 6.29 kg more than exercise alone at 12 to 18 months. They also cut 1.72 kg more than diet alone at 12 months.¹⁷ If fat loss is your main goal, an app that covers food as well as training fits the evidence better.

Freeletics is the only one studied directly

A survey by Hertel and colleagues at the Technical University of Munich, covering 3,668 Freeletics users, found 4.57 injuries per 1,000 hours of training. That rate was lower in experienced users, and most injuries cleared within a week. Shoulders (29%) and knees (28%) were the most common sites.⁶ A 2024 content analysis found 15 behavior-change techniques in the app; goal setting, action planning, self-monitoring and social support were among the most common.¹⁸ PubMed returns no studies of BetterMe or Fitify.

Freeletics vs BetterMe: which is better?

Freeletics is better for training: an adaptive Coach, a real free tier, Editors’ Choice, and peer-reviewed data on its users. BetterMe is better if weight loss and habits matter more than the workouts, because it bundles meal plans and trackers. Read BetterMe’s renewal terms before you pay.¹²⁹⁶

	Freeletics	BetterMe
Best for	Bodyweight HIIT and strength	Weight loss and daily habits
Adapts to	Your post-workout feedback1	Your sign-up quiz7
Free tier	Yes, 34 workouts1	Not described
Nutrition	Separate app or bundle1	Built in7
Regulator action	None found	UK ASA upheld a complaint in 202419

In June 2024 the UK Advertising Standards Authority upheld a complaint against a BetterMe TikTok ad for a “28-day Calisthenic Challenge”. It ruled the ad “misleading” and said it “exaggerated the capability of the programme”.¹⁹ That is a ruling on one ad, not on the app’s workouts, but it is worth knowing before you trust a before-and-after promise.

Freeletics vs Fitify: which is better?

Choose Freeletics for harder bodyweight HIIT and structured strength plans, with Editors’ Choice and a clearly defined free tier (34 workouts). Choose Fitify for short sessions using home equipment, an AI Coach you can talk to, and one clear yearly price of $69.99. Both run on iPhone, Android and Apple Watch.¹³⁵

	Freeletics	Fitify
Best for	Harder bodyweight HIIT and strength	Short sessions with home equipment
Session length	15–45 min1	15–25 min3
Exercises	700+1	900+3
Coach	Adjusts from post-workout feedback14	GPT-5 chat with voice and photos5
Yearly price	Up to $79.99 (Training Coach1)	$69.993
Free tier	34 workouts1	Selected workouts3

Freeletics is the more demanding app. Its workouts run up to 45 minutes, and in 2025 it added a strength journey with “a true emphasis on strength for the first time”.¹¹⁰ Fitify sessions are shorter, at 15 to 25 minutes, and it lists 10 kinds of equipment, from kettlebells to a pull-up bar.³

Fitify’s AI Coach is conversational: you can ask it questions, send photos, and ask for changes around an injury.⁵ The Freeletics Coach adjusts your plan mostly through the feedback you give after each workout.¹⁴

BetterMe vs Fitify: which is better?

Fitify is the better workout app: a 4.9 rating, one clear yearly price, a free tier and a GPT-5 AI Coach. BetterMe is the better all-in-one weight-loss app, with 4,000+ workouts, 20+ meal plans and habit trackers. Its price list is harder to read.²³⁷⁵

	Fitify	BetterMe
Best for	Workouts	Weight loss, meal plans and habits
App Store rating	4.9 from 12K3	4.7 from 713K2
Library	900+ exercises3	4,000+ workouts2
Meal plans	Recipes; separate Nutria app5	20+ built in7
Yearly price	$69.993	$19.99–$29.99 listed as “Annual”2
Free tier	Selected workouts3	None described

If you mainly want to train, Fitify gives you more control over the workout itself. If you want one app for workouts, food and habits, BetterMe covers more ground, and the diet-plus-exercise research backs that approach for weight loss.¹⁷

Which devices do Freeletics, BetterMe and Fitify support?

All three run on iPhone, iPad and Android, connect to Apple Health, and have an Apple Watch app. Freeletics has the lowest requirement, iOS 17; BetterMe and Fitify need iOS 18. BetterMe’s Watch app covers step and water tracking plus walking and running workouts. Fitify also runs on Wear OS.¹²³²⁰

	Freeletics	BetterMe	Fitify
Minimum iOS	17.01	18.02	18.03
Apple Watch	Control workouts from the Watch (watchOS 8+1)	Steps, water, walking and running workouts20	Yes (watchOS 10.6+3)
Apple Health	Yes1	Yes2	Yes3
Android	Yes1	Yes2	Yes, plus a Wear OS app3
Other	iPad, Vision Pro1	iPad, Vision Pro; own tracker and smart scale2	iPad, Vision Pro3

What changed in Freeletics, BetterMe and Fitify in 2025 and 2026?

Freeletics became Decathlon’s official digital training partner in 2025, adding equipment and strength programs. Fitify moved its AI Coach to GPT-5 in August 2025. BetterMe renamed its app “Well-Being Coach” and added recovery, sleep and stress tracking to its Progress tab.²⁵¹⁰

• Freeletics: Decathlon partnership with 17 new equipment options and 300+ new exercises, Workout Spaces, heart-rate zone charts from wearables, offline mode, and the Ultimate Strength Training Journey.¹⁰
• BetterMe: now “BetterMe Well-Being Coach” on the App Store, with a revamped Progress tab covering steps, recovery, sleep and stress.²
• Fitify: GPT-5 AI Coach with voice, photo feedback and injury modifications.⁵ Gym weight logs now feed the next workout.³

How do Freeletics, BetterMe and Fitify compare with SensAI?

Freeletics, BetterMe and Fitify are workout libraries with a plan on top. SensAI is a conversational coach ($69.99/yr) that reads Apple Health, so sleep and overnight heart rate shape how hard it asks you to train. It runs on iPhone and Apple Watch only, with no Android, and has no meal plans.⁸²¹

App	Plan comes from	Yearly price	Free option	Android
Freeletics	Your feedback after each workout1	Up to $79.99 (Training Coach1)	34 workouts1	Yes
BetterMe	Your sign-up quiz7	$19.99–$29.99 listed as “Annual”2	None described	Yes
Fitify	AI Coach and your logs35	$69.993	Selected workouts3	Yes
SensAI	Conversation plus Apple Health data821	$69.998	7-day trial8	No

Where these apps beat SensAI

All three run on Android, and SensAI does not.⁸ All three have far larger workout libraries: 700+ exercises in Freeletics, 900+ in Fitify and 4,000+ workouts in BetterMe, against SensAI’s 500+ exercises.¹²³⁸ BetterMe includes meal plans, and Freeletics and Fitify both offer free workouts with no trial clock. SensAI also needs iOS 26 or later.⁸

Where SensAI is different

SensAI is a coach you talk to. 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.²¹

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.²¹ 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.”²¹ To see what your device shares, read how to connect a wearable to SensAI through Apple Health.

For more coaching apps side by side, see our best AI personal trainer apps for 2026.

Which app should you choose?

Choose Freeletics for bodyweight HIIT and strength with a real free tier. Choose BetterMe if weight loss is the goal and you want meal plans in the same app. Choose Fitify for short home workouts and an AI Coach at one clear price. Choose SensAI to talk your training through on iPhone.¹²³⁸

Freeletics is a good fit if you:

• Want hard, short bodyweight sessions you can do anywhere
• Want to try a real free tier before paying
• Like a plan that reacts to how each session felt

BetterMe is a good fit if you:

• Care most about weight loss and daily habits
• Want workouts, meal plans and trackers in one app
• Will check the renewal price before a trial ends

Fitify is a good fit if you:

• Have 15 to 25 minutes and some home equipment
• Want an AI Coach you can ask questions
• Want one clear yearly price

Still weighing Freeletics against other apps? Our best Freeletics alternatives guide covers Nike Training Club, Caliber, Centr, Fitbod and Hevy.

Frequently asked questions

Is Freeletics better than BetterMe?

For training, yes. Freeletics has an adaptive Coach, a free tier of 34 workouts, Apple’s Editors’ Choice badge and peer-reviewed data on its users.¹⁶ BetterMe is the better pick if you want meal plans and habit tracking in the same app.⁷

Is Fitify better than Freeletics?

Fitify is better for short sessions with home equipment and a conversational AI Coach, at $69.99 a year.³⁵ Freeletics is better for harder bodyweight HIIT and structured strength plans.¹¹⁰

Is BetterMe better than Fitify?

For weight loss and habits, yes: BetterMe bundles 4,000+ workouts with 20+ meal plans and trackers.²⁷ For training itself, Fitify is the stronger pick, with a 4.9 rating, a free tier and a GPT-5 AI Coach at $69.99 a year.³⁵

Is BetterMe legit?

BetterMe is a real app with 4.7 stars from 713K US ratings.² Two things are worth knowing. In 2024 the UK ASA ruled one of its TikTok ads misleading.¹⁹ Its terms also say discounted offers renew at full price and that deleting the app does not cancel your subscription.⁹

How much does Fitify cost?

Fitify Pro is $69.99 a year on the US App Store. Monthly plans are listed at $6.49, $9.99 and $14.99, and a quarterly plan at $34.99.³

How much does Freeletics cost?

The US App Store lists Training Coach at $34.99 to $79.99 across 3-, 6- and 12-month plans. The Training and Nutrition bundle is listed at $49.99 to $89.99.¹

Does Fitify have an AI coach?

Yes. Fitify said in August 2025 that its AI Coach runs on OpenAI’s GPT-5 and takes voice and photo input.⁵ Fitify also uses your logged gym weights to build your next workout.³

Does Freeletics work with Apple Watch?

Yes. You can control Freeletics workouts from your Apple Watch, and it writes your training to Apple Health.¹

Which is best for weight loss: Freeletics, BetterMe or Fitify?

BetterMe fits weight loss best on paper because it combines workouts with meal plans. Research shows diet plus exercise beats exercise alone.¹⁷ Freeletics and Fitify can still work if you track food elsewhere.

Are Freeletics, BetterMe and Fitify on Android?

Yes, all three are on Google Play with more than 10 million downloads each.¹²³

The bottom line

Freeletics is the strongest training app of the three: an adaptive Coach, a real free tier, Editors’ Choice and published research on its users. Fitify is the simplest to buy, at $69.99 a year with a GPT-5 Coach. BetterMe covers the most ground for weight loss, but read its renewal terms first.¹³⁵⁹⁶

All three are built on methods the research supports. Bodyweight training builds strength, short HIIT raises fitness, and effort feedback steers training as well as a fixed plan.¹¹¹²¹⁴ None of the three says it adjusts your plan to how you slept. If that matters to you, a coach that reads Apple Health, like SensAI, fits better.

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References

Footnotes

1. Freeletics GmbH. “Freeletics: Workouts & Fitness.” Apple App Store listing (id654810212) — subtitle “Home & Gym AI Coach, Planner”; “Your AI Coach customizes each workout to your fitness level, adjusting in real time based on your feedback”; “700+ exercises”; “Choose from 30 fitness plans”; “The free version of the app contains 34 HIIT bodyweight workouts, 100+ exercises”; “6 auto-renewing subscription options: Training (3 / 6 / 12 months), Training & Nutrition (3 / 6 / 12 months)”; in-app purchases Training Coach $34.99, $59.99, $74.99, $79.99 and Training and Nutrition Bundle $49.99, $89.99; “14-day money-back guarantee”; “Control your workout from your Apple Watch and track your fitness data in the Apple Health app”; Editors’ Choice, “the 15-45 minute workouts—many of which can be completed without equipment”; requires iOS 17.0, watchOS 8.0; 4.6 rating from 22K ratings. Google Play (com.freeletics.lite): 10M+ downloads. Accessed September 30, 2026. https://apps.apple.com/us/app/freeletics-workouts-fitness/id654810212 ↩ ↩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

2. BetterMe Limited. “BetterMe Well-Being Coach.” Apple App Store listing (id1264546236) — subtitle “Pilates, calisthenics, yoga”; “OVER 4,000 HOME WORKOUTS: Pilates, calisthenics, strength training, yoga, walking, and gym-based workouts”; “No equipment needed for many workouts”; in-app purchases $4.99 (weekly), $6.99, $9.99 (weekly and monthly), $14.99, $19.99 (1 month and annual), $29.99 (annual), $41.99; BetterMe Fitness Tracker and Smart Scale; release notes on the revamped Progress tab (steps, recovery, sleep, stress); requires iOS 18.0, watchOS 11.0; 4.7 rating from 713K ratings. Google Play (com.gen.workoutme): 10M+ downloads. Accessed September 30, 2026. https://apps.apple.com/us/app/betterme-well-being-coach/id1264546236 ↩ ↩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

3. Fitify Workouts s.r.o. “Fitify: Home Workout, AI Coach.” Apple App Store listing (id1463386686) — “Fitify is free to download and includes access to selected workouts. Upgrade to Fitify Pro for personalized training plans, AI personal trainer, and a wider range of workouts”; “over 900 exercises”; “Workouts only take 15-25 minutes”; equipment including kettlebell, TRX, resistance band, dumbbell and pull-up bar; release notes “gym weight logs are used when Fitify builds your next workout”; in-app purchases Fitify Pro Monthly $6.49 and $9.99, Monthly $14.99, Quarterly $34.99, Yearly $69.99; requires iOS 18.0, watchOS 10.6; 4.9 rating from 12K ratings. Fitify Terms (https://gofitify.com/terms.html): fees “final and non-refundable”. Google Play (com.fitifyworkouts.bodyweight.workoutapp): 10M+ downloads; “Also check out our brand new app for Wear OS devices!” Accessed September 30, 2026. https://apps.apple.com/us/app/fitify-home-workout-ai-coach/id1463386686 ↩ ↩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

4. Freeletics Help Center. “Can I talk to the Coach?” and “Is the app free?” — “The Freeletics Coach is not a real person… a digital program that uses the state of the art artificial intelligence to adjust your training plan”; the free app “gives you access to many of our top signature workouts, as well as a library of single exercises, runs and audio sessions… A Coach subscription will provide a personalized training plan”. Accessed September 30, 2026. https://help.freeletics.com/hc/en-us/articles/360004957019-Can-I-talk-to-the-Coach and https://help.freeletics.com/hc/en-us/articles/360004928220-Is-the-app-free ↩ ↩² ↩³ ↩⁴ ↩⁵

5. Fitify. “Fitify AI Coach gets GPT-5 update.” August 8, 2025 — “our AI Coach now runs on OpenAI’s latest GPT-5 model”; “24/7 personal trainer who knows your training plan, your progress, and your preferences”; voice chat, photo feedback and “injury-friendly modifications”. Accessed September 30, 2026. https://blog.gofitify.com/articles/fitify-ai-coach-gpt5-update ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷

6. Hertel G, Hochrein A, Suren C, Minzlaff P, Banke IJ, Willers J, von Eisenhart-Rothe R, Prodinger PM. “Injury incidence and specific injury patterns in app-based bodyweight training (Freeletics): results of an international survey with 3668 participants.” BMC Sports Science, Medicine and Rehabilitation. 2022;14(1):145. doi:10.1186/s13102-022-00525-y. https://pubmed.ncbi.nlm.nih.gov/35883184/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶

7. BetterMe Help Center. “Which features are included” and program personalization articles — “Library of 4000+ workouts”, “20+ meal plans”, intermittent fasting, calorie, water and step trackers; program “created based on your quiz answers, considering your lifestyle, habits, fitness level, and goals”; calorie tracker “Scan with AI”. Accessed September 30, 2026. https://bettermesupport.zendesk.com/hc/en-us/articles/360019398237-Which-features-are-included and https://bettermesupport.zendesk.com/hc/en-us/articles/7983104757661-Why-are-workouts-complicated and https://bettermesupport.zendesk.com/hc/en-us/articles/7953895222941-How-to-use-Calorie-Tracker ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴

8. Origami, Inc. “SensAI: Fitness Sensei.” Apple App Store listing (id6738963099) — SensAI Premium $6.99 monthly, $69.99 yearly; “Download SensAI and get full access free for 7 days”; “500+ exercises”; requires iOS 26.0 and watchOS 26.0; iPhone and Apple Watch; conversational Coach (“Ask for a new workout plan, get feedback on a meal photo, or say “I tweaked my shoulder - adjust my week.""); 4.6 rating from 35 ratings. Accessed September 30, 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

9. BetterMe. “Subscription Terms.” Updated July 29, 2026 — discounted offers “renew at the full not discounted price”; “deleting the app does not cancel your subscriptions”; “canceling one plan does not cancel the others”; web-purchase refunds “at our own discretion”. Accessed September 30, 2026. https://betterme.world/en/subscription-terms ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷

10. Freeletics. “Freeletics 2025 Wrapped.” — “the official digital training partner of Decathlon”, “17 new equipment options and over 300 new exercises”; Workout Spaces; heart-rate zone charts; offline mode; Ultimate Strength Training Journey with “a true emphasis on strength for the first time EVER”. Accessed September 30, 2026. https://www.freeletics.com/en/blog/posts/freeletics-2025-wrapped/ ↩ ↩² ↩³ ↩⁴ ↩⁵

11. Kikuchi N, Nakazato K. “Low-load bench press and push-up induce similar muscle hypertrophy and strength gain.” Journal of Exercise Science & Fitness. 2017;15(1):37-42. doi:10.1016/j.jesf.2017.06.003. https://pubmed.ncbi.nlm.nih.gov/29541130/ ↩ ↩² ↩³

12. Poon ET, Li HY, Gibala MJ, Wong SH, Ho RS. “High-intensity interval training and cardiorespiratory fitness in adults: An umbrella review of systematic reviews and meta-analyses.” Scandinavian Journal of Medicine & Science in Sports. 2024;34(5):e14652. doi:10.1111/sms.14652. https://pubmed.ncbi.nlm.nih.gov/38760916/ ↩ ↩² ↩³

13. Haddad M, Stylianides G, Djaoui L, Dellal A, Chamari K. “Session-RPE Method for Training Load Monitoring: Validity, Ecological Usefulness, and Influencing Factors.” Frontiers in Neuroscience. 2017;11:612. doi:10.3389/fnins.2017.00612. https://pubmed.ncbi.nlm.nih.gov/29163016/ ↩ ↩²

14. 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. doi:10.1186/s40798-021-00404-9. https://pubmed.ncbi.nlm.nih.gov/35038063/ ↩ ↩² ↩³

15. Jenkins EM, Nairn LN, Skelly LE, Little JP, Gibala MJ. “Do stair climbing exercise ‘snacks’ improve cardiorespiratory fitness?” Applied Physiology, Nutrition, and Metabolism. 2019;44(6):681-684. doi:10.1139/apnm-2018-0675. https://pubmed.ncbi.nlm.nih.gov/30649897/ ↩

16. Laranjo L, Ding D, Heleno B, et al. “Do smartphone applications and activity trackers increase physical activity in adults? Systematic review, meta-analysis and metaregression.” British Journal of Sports Medicine. 2021;55(8):422-432. doi:10.1136/bjsports-2020-102892. https://pubmed.ncbi.nlm.nih.gov/33355160/ ↩ ↩²

17. Johns DJ, Hartmann-Boyce J, Jebb SA, Aveyard P; Behavioural Weight Management Review Group. “Diet or exercise interventions vs combined behavioral weight management programs: a systematic review and meta-analysis of direct comparisons.” Journal of the Academy of Nutrition and Dietetics. 2014;114(10):1557-1568. doi:10.1016/j.jand.2014.07.005. https://pubmed.ncbi.nlm.nih.gov/25257365/ ↩ ↩² ↩³

18. Kuru H. “Identifying Behavior Change Techniques in an Artificial Intelligence-Based Fitness App: A Content Analysis.” Health Education & Behavior. 2024;51(4):636-647. doi:10.1177/10901981231213586. https://pubmed.ncbi.nlm.nih.gov/38054236/ ↩

19. Advertising Standards Authority. “ASA Ruling on BetterMe Ltd.” June 19, 2024 — TikTok ad for a “28-day Calisthenic Challenge”; complaint upheld; the ad was “misleading and exaggerated the capability of the programme”. https://www.asa.org.uk/rulings/betterme-ltd-a24-1238625-betterme-ltd.html ↩ ↩² ↩³

20. BetterMe Help Center. “How to install BetterMe on your Apple Watch.” — “BetterMe app offers Step Tracker and Water Tracker features and Walking and Running workouts on Apple Watch.” Accessed September 30, 2026. https://bettermesupport.zendesk.com/hc/en-us/articles/7981294575133 ↩ ↩²

21. SensAI Help Center. “Connect your wearable to SensAI through Apple Health.” — 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.” Accessed September 30, 2026. https://www.sensai.fit/help/connect-wearable-to-sensai-apple-health ↩ ↩² ↩³ ↩⁴ ↩⁵