GymAdapt: AI that plans, coaches and adjusts, from $0
Tell it your goal, days, equipment and any injuries and it writes the plan. Log your sets and it picks your next weight. Ask the coach to "make today 30 minutes" or "swap squats, my knee hurts" and it changes the workout, just for today or for good. Free to start; Pro is $4.99 a month. See the full app tier list →
The word "AI" on a workout app can mean three very different things: a plan generated once at sign-up, a weight suggestion on each set, or a coach you can talk to that changes your training. Most apps do one of these. A few do two. This guide compares the AI workout apps people actually ask about, by what the AI does once you are standing in the gym.
What the AI in a workout app should do
- Build the plan. Exercises, sets, reps and training days that fit your goal, schedule, equipment and injuries.
- Pick your next weight. Raise it when you beat your target, hold it when you just made it, lower it when you miss. This is the part that makes you stronger.
- Change the workout when life happens. Short on time, a machine taken, a sore shoulder. A good AI adjusts the session instead of making you rebuild it.
- Explain itself. "Up 2.5 kg because you hit 10 reps on every set" builds trust. A number with no reason does not.
Plan generation is the easy part and almost every app has it. Weight progression and editing on request are where the apps differ, and where the price usually goes.
The best AI workout apps, ranked
1. GymAdapt (our app)
Free: An AI-built plan for your goal, days, equipment and injuries; unlimited workouts; a video for every lift; full logging; 3 new AI plans and 5 coach messages a week; the first 30 days of adaptive weights.
Paid: Pro is $4.99/month or $24.99/year (7-day free trial), or $79.99 once for lifetime. It keeps adaptive weights on after day 30 and removes the weekly AI limits. Code TRYFREE01 gives a month of Pro free.
2. Fitbod
Free: A 7-day free trial; no permanent free tier.
Paid: $15.99/month or $95.99/year in the US (raised from $12.99 / $79.99).
3. JuggernautAI
Free: A free trial on the developer site.
Paid: $34.99/month or $349.99/year.
4. Planfit
Free: An AI-built plan and workout logging, free.
Paid: Advanced coaching and progression are paid, from about $79.99/year.
5. Gravl
Free: 3 free workouts.
Paid: $14.99/month; yearly plans about $59.99 to $89.99 depending on offer.
6. Dr. Muscle
Free: A free trial (length varies).
Paid: $49.99/month or $399.99/year on the US App Store.
7. Alpha Progression
Free: Logging, manual plans and the full video library.
Paid: Pro $12.99/month or $79.99/year unlocks the generator and recommendations.
AI workout apps compared
| App | AI builds the plan | AI picks next weight | Free version | Price (US) |
|---|---|---|---|---|
| GymAdapt | Yes | Yes (free for 30 days) | Yes, no time limit | $4.99/mo · $24.99/yr · $79.99 lifetime |
| Fitbod | Yes, every session | Yes | Trial only | $15.99/mo · $95.99/yr |
| JuggernautAI | Yes (strength) | Yes, from set ratings | Trial only | $34.99/mo · $349.99/yr |
| Planfit | Yes | Paid | Yes | From about $79.99/yr |
| Gravl | Yes | Yes | 3 workouts | $14.99/mo · ~$60–90/yr |
| Dr. Muscle | Yes | Yes, every set | Trial only | $49.99/mo · $399.99/yr |
| Alpha Progression | Pro only | Pro only | Logging only | $12.99/mo · $79.99/yr |
US App Store prices, October 2026. Your App Store shows your local price, which can differ.
How to pick
- You want to be told what to do and see your lifts go up, on a budget: GymAdapt.
- You train for a powerlifting meet: JuggernautAI.
- You want a free AI plan and will handle the weights yourself: Planfit, or GymAdapt's free tier.
- You want zero decisions and price is not a concern: Dr. Muscle.
- You are on Android: Fitbod, Gravl or Planfit (GymAdapt is iPhone only for now).
What AI can't do for you
No app can make you show up. The best AI plan is the one you can keep doing three or four times a week for months. Pick the app whose workouts you actually look forward to, give it four weeks of honest logging, and judge it by one thing: are your numbers going up?
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. After the month it's $4.99/mo unless you cancel in Settings, and the free version stays yours either way.Questions people ask
What is the best AI workout app?
For most gym-goers, GymAdapt offers the most for the money: an AI-built plan, weights that adjust from your logged sets, a coach that edits workouts on request, and a free tier (it's our app; iPhone only). Fitbod is the best-known alternative at $95.99 a year, JuggernautAI is best for powerlifting, and Planfit has the best free AI plan.
Is there a free AI workout app?
Yes. GymAdapt's free tier includes an AI-built plan, unlimited workouts, video demos and 30 days of adaptive weights. Planfit gives you an AI plan free. Fitbod, JuggernautAI and Dr. Muscle offer only free trials.
Is Fitbod worth it in 2026?
Fitbod is a solid AI planner, but at $15.99 a month or $95.99 a year it is one of the pricier options. If you mainly want a plan plus automatic weight progression, cheaper apps such as GymAdapt ($24.99 a year, with a free tier) do the same core job.
Can an AI app replace a personal trainer?
For planning, progression and day-to-day adjustments, a good AI app covers most of what people pay a trainer for. A human is still better for hands-on form correction, injury rehab and accountability in the room.
Does the AI workout app need my injuries?
It should ask. GymAdapt lets you list injuries and conditions when it builds your plan and avoids exercises that load them; you can also tell the coach mid-workout and it will swap the exercise.
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 $79.99 once for lifetime. iPhone only. In English, Spanish, Portuguese, French, German and Japanese.