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Pro Tips

Get a more accurate reading

Two simple techniques cancel out most of a phone's built-in sensor error.

8° 180° 10°

180° rotation method

Neutralize any sensor bias by using an average of two contrasting measurements.

  1. Place the phone on the surface and note the reading (e.g. 8°).
  2. Rotate it 180° in the same spot and take a second reading (e.g. 10°).
  3. Average the two: (8 + 10) ÷ 2 = 9° — your corrected angle.
0° Zeroed 10° diff.

Zero-point calibration

Set the current surface as your new 0° baseline.

  1. Lay the device on your reference surface and let it settle.
  2. Press Zero — the current tilt becomes your new baseline.
  3. Move to the target surface; the readout now shows the difference.
5° · false tilt ZERO 0° · calibrated

Compensate for a camera bump

Cancel out the tilt a raised camera lens creates on a flat surface.

  1. Place the phone down — a camera bump often shows a false few-degree tilt.
  2. Press Zero to treat that tilted rest position as 0°.
  3. Every reading from here on is measured relative to true flat.

Ready to check an angle?

Open the tool, place your phone on the surface, and read the tilt in seconds.

Start Measuring