Checkfit vs Strong.
Strong records your workout. Checkfit decides it. Strong is a logger that assumes you bring the program; Checkfit is the program, written for you and built to grow muscle.
What Strong does well
Strong is one of the cleanest lifting loggers on iOS. The interface is fast, the exercise database is broad, RPE and rest tracking are solid, and the free tier covers most lifters indefinitely. If you already know exactly what you're doing — your program is set, your weights are picked, your progression is figured out — Strong is an excellent place to record the work.
Why lifters choose Checkfit
Strong assumes the hard part is already solved. It never picks a weight, calls a deload, or tells you when to push. If the program you're logging stopped working, a logger just keeps a tidy record of you not progressing.
Checkfit writes the program and runs it. It calibrates a six-week hypertrophy mesocycle to your current strength, picks the weight for every set, manages your volume, schedules deloads, and adjusts the next session from the reps in reserve you reported on the last one. You don't decide what to lift, how heavy, or when to back off — the app does, using the same hypertrophy science a good coach would.
And it covers what actually drives growth: daily calorie and protein targets are built in, plus an optional coach connection. Strong tracks your sets; Checkfit handles the programming and the nutrition that turn those sets into muscle.
Nutrition the others don't have
Strong logs the work in the gym and stops at the door. The eating — the part that decides whether you actually gain or lose — is on you and whatever second app you cobble together. Checkfit closes that gap inside the same app. You get a daily calorie and protein target, then you log your food against it: search a food, add it, watch the running total move toward your number. Cutting means staying in a deficit you can see; gaining means hitting protein every day.
It's one app and one subscription for both the training and the eating, instead of a logger here and a macro tracker there. See how nutrition works.
At a glance
| Checkfit | Strong | |
|---|---|---|
| Programming | Six-week mesocycles, automatic | You bring your own |
| Weight selection | Calculated each session | You enter manually |
| Progression | Automatic, RIR-based | Manual |
| Calorie & protein targets | Included | None |
| Food logging | Built in | None |
| Coach connection | Included | None |
| Free trial | 7 days | Free tier available |
| Price | $17/mo, all in | Free or paid Pro |
The verdict
If you already have a program you trust and just want a clean place to log it, Strong is a fine choice — maybe a better one. But a logger won't make you grow. Checkfit writes the program, picks the weights, and logs your food against a calorie and protein target — all in one $17/mo subscription, no second app to pay for. If you want the whole job done in one place, get Checkfit.
