2025-09-12 00:00:00 The Bubble Level app is a must-have tool for professionals and DIY enthusiasts. It helps you check whether a surface is perfectly horizontal (level) or vertical (plumb). This versatile tool works on various surfaces, including floors, walls, windows, and furniture. Designed for accuracy, it functions just like a traditional spirit level, making leveling tasks easier than ever. How It Works A bubble level consists of a sealed tube filled with liquid. When placed on a surface, the position of the bubble indicates whether the surface is flat or inclined. If the bubble stays centered, the surface is level; otherwise, it shows the direction of the tilt.