Missing the good old geometry set square from school? Use your Phone to draw geometry exact figures on paper. Also this app is used in physiotherapy to measure movement angles.
Goniometer tool using the gyroscope sensor features:
✔ Measure relative angles and rotation counter ✔ 5 Unit modes, with a quick switch ✔ Background or foreground display rotation ✔ Fine calibration of the gyrometer ✔ Motion sensitive or manual lock mode ✔ Scrollable ruler (inch or cm)