Crunch form check
Film a set from your phone and FORMA counts the reps and tells you what went wrong on each one. It runs entirely on your device — the video never leaves your phone, and you do not need an account.
Check my crunchHow to film it
Film from the side, whole torso on the floor in frame.
What it measures
- Hip angle — the angle the rep is counted from and the live readout on screen.
- Knee angle — the second angle it watches for the faults that matter on this lift.
How a rep is counted
A rep is counted when your hip angle passes 132° and comes back past 152°. Depth is judged separately, so a short rep still counts — and still gets told it was short.
Form is judged at the bottom of the rep, where the lift is hardest and where it breaks down.
Learn the movement first
The analyser tells you what went wrong on a rep. The guide tells you how the lift should look in the first place — muscles worked, setup, and the common mistakes.
Read the crunch guide