This Spirit Level is a Bubble Level, Surface Level, Horizontal Level, Vertical Level and a Bulls Eye Level. Bubbles measure angles less than 10° giving high precision. Functions upside-down ideal for ceiling work. Astronomy Mode turns the screens brightness down and goes red so you don't lose your night vision. Includes a Compass too.
Get the setup package of Spirit Level 2.1 that is available for free and read users' reviews on Droid Informer. The app is designed for Android 4.1 and higher. This application is completely safe for downloading. SpaceRocket is the official developer of Spirit Level that can be found in the Tools category.