Best AI personal trainer apps in 2026
“AI personal trainer” means very different things. Some apps generate a workout and leave you alone with it, some are a log with a few smart features, and a few actually coach you during the session. Here is what each of the popular apps does once you are in the gym.
Prices and features checked on the US App Store on October 15, 2026.
What to look for
- Does it coach during the workout? A plan is easy to generate. Knowing what to lift on set three after a bad night's sleep is the hard part.
- Does it learn from your sets? The weight it suggests should come from what you actually lifted and how hard it felt, not from a template.
- Can you ask it things? Machine taken, missed reps, a twinge in your shoulder — a coach answers; a generator doesn't.
- Is everything in one place? Workouts, food and body measurements in one app means the coach sees the whole picture.
The apps at a glance
| Gloox | Fitbod | Hevy | |
|---|---|---|---|
| Coaches you set by set during the workout | Yes — weight, rest and next set adjust as you go | No — generates the workout | No — a log |
| AI chat coach you can ask anything | Yes, text or voice | No | No built-in chat |
| Weights from your own history | Yes | Yes | Manual |
| Nutrition diary | Yes, calories from a photo | No | No |
| Free plan | Log, programs, food diary, 5 coach messages | Free trial | Yes, with limits |
| Price (US App Store) | $9.99/mo or $69.99/yr | $15.99/mo or $95.99/yr | $2.99/mo, $23.99/yr or $74.99 lifetime |
Gloox — a coach that runs the workout with you
Turn the coach on and Max or Eva guide the whole session: they ask how you slept and how much energy you have, run a warm-up, give you the weight and reps for every set from your history, time your rest and recalculate the next set after you rate the last one from “easy” to “failure”. If the bench is taken, tap Ask and get a swap with the weight converted. The same app keeps a food diary (snap your plate for calories and macros) and body measurements, and the coach sees all of it.
Best for: people who want guidance in the gym, not just a list of exercises. Less ideal if: you only want a free, bare-bones log.
Fitbod — a smart workout generator
Fitbod builds each session around your equipment and recovering muscles and suggests weights from past workouts. It has a big library (1,000+ exercises with video) and good Apple Watch support. It does not talk to you during the workout or track food, and it is the most expensive of the group.
Best for: people who just want a fresh, sensible workout each day.
Hevy — the best simple log
Hevy is a fast, clean workout tracker with a generous free tier and a social feed. Pro adds unlimited routines and charts and is very cheap. There is no coaching in the session and no nutrition — you decide the weights yourself.
Best for: experienced lifters who already know their program and want a great log.
Freeletics — bodyweight training
Freeletics is built mainly around bodyweight and HIIT sessions you follow along with; nutrition coaching is a separate product. It suits home and outdoor training more than barbell and machine work in a gym.
Our take
If you train in a gym and want to know exactly what to do on each set — and to stop guessing — pick an app that coaches during the workout. If you only need a log, Hevy is hard to beat on price. Fitbod sits in between: a good plan every day, but you are on your own once you start lifting.
A coach that guides every set
Gloox picks today's weight from your last workout, times your rest and adjusts the next set to how the last one felt. Free to start, 7-day free trial of PRO.
On a computer? Point your phone's camera here to get the app.
Questions
Is there an AI personal trainer that guides you during the workout?
Yes. Gloox's coach runs the session set by set: warm-up, the weight for every set, rest, and the next set adjusted to how the last one felt. You can also ask it questions mid-workout.
Which AI fitness app is free?
Hevy and Gloox both have usable free plans. Gloox's free plan includes the workout log, ready-made programs, the nutrition diary and 5 coach messages; the coach in the workout is part of PRO, with a 7-day free trial.
Can an AI app replace a personal trainer?
For programming, weight selection and day-to-day guidance it gets close, and it is far cheaper. It cannot watch your form in person, so learn new lifts carefully and see a professional for pain or injuries.