Every posture app fails the same way — nothing catches you the moment you slouch. Stature does, using the motion sensors already in your AirPods. No camera, brace, or clip. Drop below neutral and you feel a gentle buzz, instantly, all day, in the background. What's different: real-time AirPods head tracking, a Dynamic Island Live Activity, focus sessions, daily reports, Apple Health sync, and a 14-day habit program. The problem was never motivation. It was memory — Stature remembers for you.