Bubble Level – Spirit Level

A clear, honest spirit level.

• Lay the phone flat for a round bull's-eye level, or on its edge for a tube vial — the app switches automatically
• Read the angle to 0.1°, filtered to be steady like a real vial, not jumpy
• Calibrate once on a surface you trust; long-press to reset calibration
• Hold freezes the reading, so you can level in an awkward corner and read the result in good light
• A gentle vibration tick the moment you hit level
• Works fully offline, uses only the phone's built-in tilt sensor, and asks for no permissions at all

The free version shows one small banner ad. A small one-time purchase removes ads forever.