A strength training app that writes your program, picks your weights, and tells you what to do next.
Two lifts is enough. Checkfit sets your starting weights from there.
Each session unlocks the next. Each week tightens the screws.
Weight and reps prefilled from last session. Adjust or confirm.
Every set you log builds a picture. Strength over time, body composition, how each lift is moving.
The program adjusts based on what you logged last session.
No more guessing. Open the app, hit GO, lift.
Sets in seconds, not screens.
Recovery weeks scheduled by default.
Checkfit is an adaptive strength training app for iOS. It writes your program, picks your weights based on your performance, and tells you exactly what to do each session.
You log two lifts to calibrate. From there, Checkfit uses your performance and RIR (Reps in Reserve) targets to calculate the right weight for every set automatically.
RIR stands for Reps in Reserve — how many reps you could still do before failure. Checkfit uses RIR targets to manage training intensity, progressively increasing difficulty each week.
Each strength phase is 6 weeks, including a scheduled deload week. Sessions unlock progressively and intensity increases each week.
iOS only for now. Android is not on the roadmap at this time.
Checkfit is in beta on iOS. Request an invite below and we'll get you in.