Handy Ruler for Android
Key features:
✓ Handy ruler
✓ Measures in cm, or inches (decimal or fraction)
✓ Just measure anything that fits into the screen
✓ Measures just length, or length and width at the same time.
✓ Has a high precision caliper mode for accurate adjustment of the measuring area.
✓ The measurements can be stored in a list. A listed measurement can be retrieved back to the screen.
✓ Calibrated already at the factory. If that is not good enough it is possibe to calibrate by using another ruler or a suitable object of known size such as a credit card.
✓ Easy to use
Disclaimer:
Be careful to not scratching your screen when putting objects at it.
Support/feedback: apps@physics.software