Terms
Short, because the thing is free, runs on your own machine and keeps nothing of yours.
Last updated 28 September 2026
It counts reps. That's the promise.
Countess is provided as is, without warranty of any kind. It's a rep counter built around a pose estimator, and pose estimators miss reps — in bad light, in a crowded frame, in a movement they weren't taught. Don't use the count anywhere an exact number matters.
It is not medical or coaching advice
The movement notes are general form cues, not instruction tailored to you, and the app cannot see whether something hurts. Stop if it does, and talk to a professional about what your body should be doing.
Your data is yours, and it's on your machine
Free training data is stored locally and ends with the browser tab. A Pro account's history syncs to your account so it can survive a device — it is yours, never sold, never shown to anyone else, and deleted when you close the account.
Changes
When the way this works changes — a backend, an account that means something, anything that leaves your device — these pages change first, not after.