2025-08-21 00:00:00 The Bubble Level app is a useful tool for professionals. It can be used to check horizontals(level) or verticals(plumb). You can use it on any surface, like floors, windows, and walls. The Bubble Level app is available on Android devices and works great as a spirit level too. A bubble level typically consists of a glass tube filled with fluid and sealed at one end. The tube is then inverted and placed on the surface to be tested. If the surface is flat, the liquid will be level in the tube, indicating that it is also flat. If there are slight inclinations in any direction, they can be detected by observing which way the liquid moves when disturbed from its natural position in the tube. A bubble level is a device that indicates whether a surface is horizontal. It works by showing the user if a surface is at an angle to the ground or not.