Rep Counter

Stick your phone to the weight stack with the magnetic case, then start the warm-up set. Needs motion sensor access — must be served over https:// (or localhost) to work.

Warm Up — Calibrating

Do 8–10 reps at your normal pace. Expect noisy readings for the first rep or two while you get positioned — that's normal.

Samples
0
Elapsed
0.0s

Working Set

0
reps
Benchmark ROM
-
Triggers 70% / 30%
-

Rest

0:00
elapsed

Log Session

Session Saved

Test Mode

Replay a saved motion recording through the live analysis path.

Signal (projected acceleration)

Displacement estimate & triggers

noise/setup exercise region
Displacement is acceleration integrated twice, so small sensor bias becomes drift. The displayed trace is drift-corrected within the exercise region; its zero level is arbitrary. Dashed lines: upper 70% arms the counter, lower 30% counts the rep. Dotted lines show average peak/trough.
Rep debug will appear after analysis.