Tap Start Leveling. Set your phone on the surface. Nudge the object until the reading stays inside the green ±0.2° band. You’ll feel a short buzz when it’s spot‑on.
It tells the tool to treat the current position as zero. Useful if your phone case or surface isn’t perfectly flat. Reset clears that offset.
Modern phones are very consistent. We show a small tolerance band of ±0.2°. For best results, keep the phone steady for a second before reading.
Browsers block sensors until you tap. We never collect or send any sensor data—it stays entirely on your device.
If nothing moves: make sure you’re on HTTPS, then enable “Motion & Orientation Access” in your browser settings and reload.