Smart ruler. Measure the length (size).

Level (waterpas, plumb bob), ruler. Measuring angles and slope.

Brain games: math tricks and cool math

Digital Compass

Level, Plumb bob (camera mode) and Ruler. Measuring length, angles and slope.

Smart ruler. Measure the length.

Digital Compass

Flashlight. Torch (No Ads)

Fun game - Dots. Brain training: memory, attention and concentration