GoKawiilBubble Level app brings single-axis spirit-level tool to Android phones
An Android Authority writer tested a free app called Bubble Level after finding Samsung's built-in Surface Level tool on the Galaxy S26 Ultra inadequate for checking whether a narrow object, like a TV mounting frame, was level. Unlike Samsung's bullseye-style tool, which measures tilt across two axes for flat surfaces, Bubble Level provides a traditional single-axis spirit-level reading similar to the iPhone's Measure app.