Bubble Angle is feature complete bubble level
application.
Application should be calibrated on the sides you
wish to use before measuring an surface. Features:
Operates on all 6 orientations
Calibration for all orientations
Animations
Can keep screen on
Provide a sound when a surface is level Dynamic translation
Ability to lock the screen
While in Guide or in Settings has only 4 orientations
for easy reading

download here