SitTall - Fix Your Posture

The app runs in the Mac menu bar and uses the built‑in six‑axis motion sensors of AirPods (or Beats Fit Pro) to monitor head position at about 60 Hz. It continuously evaluates forward head drift, side tilt and gradual collapse, then issues a gentle reminder when a slouch persists beyond a configurable interval. Calibration is performed with two taps – one while sitting upright and one while slouching – after which the software tracks the user’s personal posture baseline without any external measurements.

All processing occurs locally on the Mac; no camera access, account creation, or data transmission is required. The user can adjust sensitivity, alert duration and cooldown periods, and can snooze or dismiss reminders with a single click, keeping the experience unobtrusive and privacy‑focused.

The tool is targeted at Mac users who already wear AirPods and want a simple, camera‑free way to receive real‑time posture feedback while working. It is distributed through the Mac App Store and requires macOS 14 Sonoma or later on Apple‑silicon hardware.