Fitbod
Fitbod builds workouts based on the equipment you tell it you have and rotates exercises using a muscle-recovery model, so it tries to avoid hitting the same muscle group two days in a row. It's a solid choice if you like a fresh workout generated each session with minimal setup.
Verdict: Good for varied, equipment-aware workouts, but it doesn't track food or body weight, so you'll need a second app for that.
Juggernaut AI
Juggernaut AI comes from a well-known strength-sports coaching background and focuses on autoregulated programming — it adjusts your working weights based on how your sets go. It leans toward powerlifting and strength-focused lifters rather than general fitness.
Verdict: Strong pick if you specifically want autoregulated strength programming and don't need nutrition or mobility tracking in the same place.
Hevy
Hevy is primarily a workout logging app with a clean interface and a genuinely social feed — you can follow friends, see their workouts, and share your own. It has routine templates, but it doesn't generate a program for you; you decide what to do each session.
Verdict: Great if logging speed and social motivation matter more to you than having an AI decide your workout.
Strong
Strong is another established logging app, similar in spirit to Hevy: fast set entry, custom routines, and progress charts. It's less social than Hevy but has a long track record and a loyal user base.
Verdict: A dependable choice if you already know your program and just want a clean way to record it.
FlexFit
FlexFit generates your strength workouts from your equipment, schedule, and how your last session felt, and adjusts week to week automatically. You can also build your own programs and edit any generated session — swap exercises, add or drop sets, or run your own split. The same subscription also covers mobility routines, food and macro logging (by text or photo), and body weight tracking, so you're not stitching together separate apps.
Verdict: Best if you want the programming decisions handled — or just a head start you can edit — with training, mobility, and nutrition in one place.
Which one for you
Pick Fitbod or Juggernaut AI if you want AI-driven programming but don't need food or body tracking bundled in. Pick Hevy or Strong if all you want is a fast logger, with Hevy adding social features Strong doesn't have — though FlexFit will happily run a program you build yourself, too. Pick FlexFit if you want the workout-generation piece of Fitbod or Juggernaut AI plus food, weight, and mobility tracking in the same app, without hitting a paywall on any of it.