clinometer + water level + compass

A colorful minimalistic bubble level tool bull's eye level or just level tool. 
Hold device flat relative to the ground to use as a 360-degree bubble level tool, or hold device vertical to the ground to use as a horizon bubble level tool. 
This bubble level also displays inclination angles for x and y axes, which can be configured in settings. 
Supports calibration of the 360 bubble level and the horizon bubble level.

Compass : Use just like a real compass.
A compass is a navigational instrument that shows directions in a frame of reference that is stationary relative to the surface of the Earth. The frame of reference defines the four cardinal directions (or points) – north, south, east, and west.

Water level : A colorful minimalistic bubble level tool bull's eye level or just level tool. 
Hold device flat relative to the ground to use as a 360-degree bubble level tool, or hold device vertical to the ground to use as a horizon bubble level tool.