OuterPractice is a posture and tension app for musicians that tracks posture, facial tension, and timing during practice in the browser, with nothing recorded or uploaded.
A posture and tension app for the way you actually play.
OuterPractice watches your posture, jaw, and timing while you practise — and shows you a calm timeline afterwards. In your browser. Nothing recorded, nothing uploaded.
Posture, tension, and timing — second by second.
Three observation layers run in your browser at sixty frames per second. Only the numbers are kept; the camera and microphone feeds are processed live and discarded.
Posture
Shoulder line, forward-head drift, and torso angle, tracked with browser-native pose landmarks.
Facial tension
Jaw clench, brow tension, and blink rate — as numbers, never as stored video.
Timing
Onset jitter and dynamic events from ambient audio, processed live and immediately discarded.
Built for players and their teachers.
Sixteen instrument profiles — drums, piano, guitar, strings, winds, brass, voice — and an asynchronous lesson loop so a teacher can review home practice without being in the room.
Free to start. One-time to go deeper.
The live session and timeline are free, forever. Pay once for the tension fingerprint or the full teacher loop — no subscription, no cloud lock-in.
Questions.
Is OuterPractice really a posture app for musicians?
Yes — it tracks posture, facial tension, and timing while you play, then shows you a calm timeline of what it noticed. It runs in your browser; nothing is recorded or uploaded.
Which instruments does it work for?
Any seated or standing musician: drums, piano, guitar, strings, winds, brass, and voice — sixteen instrument profiles, with per-instrument tension weighting.
Do I need to install anything?
No. It is a web app — open it in your browser and press start. You can add it to your home screen as a PWA, but there is no app store and no download.
What does it cost?
The core practice loop is free, forever. A one-time Practice licence (€29) adds the tension fingerprint; a one-time Teacher licence (€149) unlocks the import, annotate, and send-back loop. No subscription.
Open the tool. Sit at your instrument. Press start.
The first thirty seconds are quiet. Then it just watches.