Stay Fit vs Strong App (2026): Which Free Tracker Wins?

Strong has been the go-to recommendation for serious lifters since about 2015, and honestly? Fair. It's quick, it's clean, and it doesn't try to turn your gym session into a social media post. The problem shows up the moment you want a fourth custom routine on the free plan. That's not a glitch. That's the business model working exactly as designed.

Stay Fit runs the same basic workflow without that ceiling. Here's where the two actually split once you stop reading landing pages and start logging real sessions.

Price and what you actually get for it

Strong's free tier logs workouts and gives you basic charts, but you're stuck at 3 saved custom routines. Need a fourth? Maybe you're starting a new mesocycle, or swapping programs after a deload week. You're subscribing. Strong PRO runs $4.99/mo, $29.99/yr, or $99.99 as a one-time lifetime purchase.

Stay Fit doesn't have a PRO tier. There's nothing to unlock.

The one column where Strong wins outright is Apple Watch. If you log sets from your wrist between reps without fishing your phone out of your pocket, Strong's watch app is more polished than anything in the free-and-offline category right now, Stay Fit included.

Logging speed: close, but not identical

Strong built its name on tap-to-log speed, and it still delivers. Pre-filled weight and reps from your last session, minimal taps between "start workout" and "log set." That's the whole pitch, and it holds up.

Stay Fit keeps pace with previous-session hints baked into the guided flow, so you see last week's numbers before you decide what to attempt today. In practice, neither app will slow you down mid-session. The real split happens after you rack the bar: Strong's free charts stay basic, while Stay Fit's reports aren't gated at all. Weekly, monthly, and longer-period breakdowns start from workout one.

Picture this: you finish a heavy squat day, wipe your hands, and want to know if your training frequency is actually trending up. On Strong's free tier, you're getting a partial answer. On Stay Fit, you're not wondering what you'd see if you paid.

Progress tracking without a paywall

This is where the gap gets obvious. Strong's free tier covers the essentials (total volume, basic history) and saves the detailed stuff for PRO. Muscle-balance insights, longer-term charts, and some export options sit behind the subscription.

Stay Fit ships all of it free: a workout streak on the home screen, a year-long activity heatmap, muscle-balance insights pulled from your training history, and achievements that unlock as you stay consistent. No upgrade prompt. No "unlock full analytics" banner after your third week.

Goals and body tracking

Strong doesn't really do goal-setting. It's a logger, not a coach. If you want to track a target bodyweight or hit a weekly frequency goal alongside your lifts, you're either scrolling through old sessions or opening a second app.

Stay Fit builds it in. Log body weight and measurements, store progress photos on-device, and set a goal for weight or weekly training frequency during onboarding. It's not trying to replace a spreadsheet. It's trying to make you stop maintaining one.

Data ownership and offline behavior

Both apps work offline for logging, which matters more than most comparisons admit. Gym basements, warehouse gyms, garage setups with spotty signal: you still need to log the set while the weight's fresh in your head.

The difference is what happens to your data afterward. Strong's free CSV export covers basic history. Fuller backup and more complete export options are part of PRO. Stay Fit exports full JSON or CSV backups for free, and you can share that file to Drive, Files, or whatever cloud storage you already use. No account, no sync service, no server holding your training history hostage if the app disappears tomorrow.

Who should actually pick Strong

You're on Apple Watch and you log sets from your wrist without touching your phone. Strong's watch integration is the most mature option in this comparison, full stop. Paying $4.99/mo for that workflow is a reasonable trade if that's genuinely how you train.

Who should pick Stay Fit

Everyone else. Specifically, anyone training on Android who wants the full feature set (streaks, goals, measurements, unlimited routines, full analytics) without deciding whether this month's lift log is worth a subscription. That's most people comparing these two apps in the first place.