Qibla
Face the House.
A compass tuned to the great-circle bearing of the Kaʿbah from your current coordinates.
Calibration
On mobile, move your device in a figure-eight to calibrate the magnetometer. iOS requires you to tap “Enable compass” once per session.
How it's computed
Bearing is the great-circle initial heading from your coordinates to the Kaʿbah (21.4225° N, 39.8262° E).