How to use this test
- Hold phone flat; observe Z-axis reading near 9.8 m/s2 (Earth gravity).
- Tilt phone left and right to observe X-axis shifts.
- Tilt phone forward and backward to observe Y-axis shifts.
- Gently shake device to view dynamic acceleration spikes.
How to understand your result
Looks good: Motion sensors reported continuous linear acceleration across all three axes.
Troubleshooting: what to try next
- On iOS Safari, tap 'Request Sensor Permission' button to authorize motion access.
- Desktop PCs without motion sensors will display an informative unsupported state.
What this test cannot tell you
Desktop computers without built-in accelerometers cannot generate motion events.
Frequently Asked Questions
The accelerometer measures acceleration including gravity; 9.8 m/s2 represents Earth's downward gravitational pull.
EP
Tested & Reviewed by [REAL AUTHOR NAME - OWNER TO COMPLETE]
Last Reviewed: 2026-10-17 • Test Method: DeviceMotionEvent accelerationIncludingGravity three-axis vector monitoring • How We Test