Smart ruler. Measure the length (size).

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

Brain games: math tricks and cool math

Digital Compass

Smart ruler. Measure the length.

Digital Compass

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

Flashlight. Torch (No Ads)

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