A traditional fitness app is a logbook. You decide the exercises, sets, and loads, and the app stores them, shows your history, and gets out of the way. A AI workout planner writes the session itself — from your equipment, your schedule, and what you actually did last week — and logs it in the same place.
Five questions separate them:
- Who writes the session — you, a prebuilt plan, or the app?
- How loads progress week to week — do you decide, or does the app adjust from your logged sets and how hard they felt?
- Equipment awareness — can it build around two dumbbells at home as easily as a full rack?
- Logging — how fast is it once you're mid-set?
- Food and body weight — in the same app, or a second subscription?
Longer read: AI personal trainer app vs a generic workout app.
Fitbod
Generates each session from the equipment you pick and what you've trained recently, then logs it. Good if you want sessions written for you without managing a program. Check the app's current pricing.
Juggernaut AI
Structured strength programming with effort feedback after your sets. Best if barbell strength is the main goal and you want a program shape you follow for weeks. Check the app's current pricing.
Hevy
A clean, fast logger with routines and a social feed. You write the plan; it remembers it well. Best if you already know what you're doing each session.
Strong
Minimal, quick logging with plate math and history. Best if you want the least friction between sets and nothing else.
JEFIT
A large exercise library with prebuilt plans plus logging. Good if you'd rather browse plans and pick one than have a plan generated.
Rayfit
A smaller, newer app in this category. We don't have verified feature or pricing details — check its own site and ask who writes the session and how progression works.
MyFitAI
Another newer entrant. Check its site directly for what's included and what an AI generation costs you each month.
Gainframe
Newer and less documented. Before subscribing, confirm whether it generates sessions or only stores them, and whether it knows your equipment.
Forge Trainer
Also newer. Ask the same five questions above — especially whether progression uses your logged sets or just repeats the plan.
FlexFit
Generates each session from your program's current week, the sets and reps you logged last time, how hard they felt, and how long you have today. Tell it what equipment you have — a rack, two dumbbells, or nothing — and switch between home and gym profiles in one tap. It's generated by default and manual whenever you want: set your own split and volume, swap exercises, add or drop sets, or build a program yourself. Mobility, macros (typed or photographed), and body weight live in the same app. $19.99/month or $120/year, everything included, 7-day free trial.
Which one for you
Want a logbook and nothing more? Hevy or Strong. Want a plan to follow off the shelf? JEFIT. Barbell strength only? Juggernaut AI. Want the session written, progressed from your own numbers, and your food and weight tracked beside it? FlexFit.