GymAdapt: an AI coach that edits your actual workout
Ask it to cut today to 30 minutes, swap an exercise that hurts, or move leg day to Thursday, and it changes the plan, not just the conversation. It also sets your weights from what you log. Free to start, Pro $24.99 a year for unlimited coaching. Get GymAdapt free on the App Store →
"AI coach" has become a label on everything from a chatbot to a progression algorithm. This page grades nine apps on four concrete jobs a coach does: writes the program, sets the weight, adapts between sessions, and answers questions about your training. For the broader planner comparison see best AI workout app; for apps that replace a trainer, free personal trainer app.
What each "AI coach" actually does
| App | Writes your program | Sets your weights | Adapts between sessions | Chat that changes your plan | Price | Free? |
|---|---|---|---|---|---|---|
| GymAdapt (our app) | Yes | Yes | Yes (30 days free, then Pro) | Yes, with caps | $24.99/yr | Yes |
| Fitbod | Yes | Yes | Yes | No | $95.99/yr | Trial |
| Hevy Trainer (Hevy Pro) | Yes | Yes | Yes | No | $23.99/yr | No (Pro) |
| Dr. Muscle | Yes | Yes | Yes | No | Subscription | Trial |
| Alpha Progression | Yes | Yes | Yes | No | $79.99/yr | Limited |
| Juggernaut AI | Yes (powerlifting) | Yes | Yes | No | Subscription | Trial |
| Caliber | Yes | Coach if paid | Coach if paid | Human coach, paid | $19/mo+ | Plans free |
| Future | Human | Human | Human | Human, paid | ~$199/mo | No |
| Ladder | Coach-led classes | No | No | No | $179.99/yr | Trial |
US App Store prices, checked October 2026; prices vary by country.
How we ranked them. Four things, in order: what you get from the coach without paying, whether the app decides your plan and your next weight or leaves that to you, whether every exercise has a demo you can watch at the rack, and price if you do pay. GymAdapt is our app and we say so wherever it appears; where another app is better, the table says that too. Prices were checked in October 2026 and are US App Store prices.
The ranking
1. GymAdapt (our app)
Free: An AI-built plan for your goal, days, equipment and injuries; unlimited workouts; a video for every lift; full set logging; weights that adjust from what you log for your first 30 days; 25 AI coach messages in your first week, then 15 a week; 3 new AI plans in your first month, then 2 a month.
Paid: Pro is $4.99/month or $24.99/year with a 7-day free trial. It keeps your weights adjusting after the free 30 days, plus unlimited AI coaching and plans. Code TRYFREE01 gives a month of Pro free.
2. Fitbod
Free: None after the 7-day trial.
Paid: $15.99/month or $95.99/year.
3. Hevy
Free: Unlimited logging, 4 routines, 7 custom exercises, 3 months of charts, ads.
Paid: Pro $2.99/month, $23.99/year or $74.99 lifetime; Hevy Trainer (plan generator) is Pro.
4. Dr. Muscle
Free: Trial only.
Paid: Subscription (check the App Store for your country).
5. Alpha Progression
Free: Limited free version.
Paid: Pro $12.99/month or $79.99/year.
6. Juggernaut AI
Free: Trial only.
Paid: Subscription (check the App Store for your country).
7. Caliber
Free: Plans, logging and progress tracking.
Paid: Group coaching from $19/month; 1:1 coaching $200+/month.
8. Future
Free: None.
Paid: About $199/month.
9. Ladder
Free: 7-day trial only.
Paid: About $29.99/month or $179.99/year.
Chat coaches vs algorithm coaches
Fitbod, Hevy Trainer, Dr. Muscle, Alpha Progression and Juggernaut AI are algorithm coaches: good at the maths of progression, silent when you have a question. GymAdapt is both: the progression is automatic, and the chat is grounded in your plan and your log, so "my shoulder hurts on overhead press" produces a swap in today's workout, and "I only have 30 minutes" trims it. Caliber and Future put a human on the other end, which is better coaching and 8 to 80 times the price.
What is free
GymAdapt is the only AI coach on this list with a free tier: plan, videos, logging and adaptive weights for 30 days, plus 25 coach messages in your first week and 15 a week after. Caliber's plans are free but the coaching is human and paid. Everything else is a trial or a subscription from day one.
GymAdapt is free to start. Want Pro free for a month?
The free version gives you an AI-built plan and unlimited workouts. Code TRYFREE01 adds a full month of Pro: weights that adjust from what you log and unlimited coach chats.
Redeem the free month → Opens the App Store with the code filled in. iPhone only. GymAdapt is free to $24.99 a year: after the free month, Pro renews unless you cancel in Settings, and the free version stays yours either way.Questions people ask
What is the best workout app with an AI coach?
GymAdapt (our app): it writes the plan, sets and raises your weights, and the chat edits your workout. Free to start; Pro $24.99 a year. Fitbod is the best-known paid alternative at $95.99 a year, without chat.
Does Fitbod have an AI coach you can talk to?
No. Fitbod generates workouts and weights with an algorithm; there is no chat.
Does Hevy have an AI coach?
Hevy Trainer, inside Hevy Pro ($23.99 a year), builds a program and progresses the weights. It is an algorithm, not a chat coach.
Is there a free AI workout coach?
GymAdapt's coach is free with caps: 25 messages in your first week, then 15 a week, plus the free plan and adaptive weights for 30 days. Pro removes the caps.
AI coach or human coach?
A human (Future about $199 a month, Caliber 1:1 $200+) is better at form feedback and accountability. An AI coach at $0 to $96 a year is better at never missing a session, doing the progression maths and being there at 6 a.m.
A coach, not just a counter, free to start
GymAdapt builds your plan and raises your weights from what you log. Free to start; code TRYFREE01 adds a month of Pro.
Get GymAdapt on the App Store → Free to start. Pro is $4.99 a month or $24.99 a year (7-day free trial), or $59.99 once for lifetime. iPhone only. In English, Spanish, Portuguese, French, German and Japanese.Sources
- SensAI: Fitbod review 2026 ($15.99/mo, $95.99/yr)
- Hevy Help Center: what is Hevy Trainer?
- Dr. Muscle on the App Store
- Alpha Progression on the App Store
- SensAI: Juggernaut AI vs RP Hypertrophy vs Alpha Progression (Oct 2026)
- Garage Gym Reviews: Caliber strength training app
- SensAI: Future app review 2026 (price and coaching)
- Ladder pricing
- SensAI: fitness app pricing and free tiers 2026
