The phone is the instrument: hold it in front of your face like a small mirror. It measures your position live and talks you through each hold, speaker aimed at you, big cues if your hearing is off.
–°
enable sensors to start
10 s
How this becomes the Epley guide in the app
One practical hold, whole maneuver: phone in front of your face like a mirror, held by the hand opposite the treated ear — speaker toward you, screen visible, strong arm free to brace, and you never roll onto the phone arm. Tap once to zero while sitting.
The seated 45° turn can't be seen by tilt sensors (physics, not a bug), so it's voice-coached ("nose halfway to your shoulder") with a rotation-sensor check during the turn.
Every lying position is measured live — the app tracks full 3D orientation (not just tilt like this web demo), so lie-back depth, the 90° head turn and the roll to nose-down each get a green zone + auto-timer no matter how you hold the phone.
Easy mode for anyone who can't hold an arm up while dizzy: phone rests on the chest, torso angles measured, head angles voice-only.
Hands-free coaching: voice, sounds and vibration — eyes can stay shut. The timer only runs while you're actually in position. Finishing logs an Epley relief so Insights can tell you if it genuinely works for you.
This page uses the browser's motion API, which is the weaker cousin of what the app gets natively (Expo sensors + real haptics + background audio). If the angle here feels solid, the in-app version will be better. Educational tool — it measures angles, it does not diagnose.