Hello, I'm Android boy. Thank you for your interests.
After make [Smart Ruler] for the length measurement, I had to make a angle measurement.
Smart Protractor Lite has two mode.
① Touch Mode
② Plumb Mode
* Introduction video
* Pro version added features
1) ProtractorⅢ(camera), Surface level
2) Horizontal x Vertical
3) Multi-Touch mode
4) Caliper mode
5) Architectural and Engineering Scales
6) Thread pitch gauge
7) various Tilt units