Smart Ruler, developed by HỌC TỐT, is a free utility and tool application for Android devices that provides a smart ruler to measure the size of objects around you accurately. This app is designed to measure the length, width, height, diameter, and other dimensions of an object to every millimeter. With its compact design and user-friendly interface, Smart Ruler is easy to use and can run well on any smartphones and tablets.

One of the most remarkable features of Smart Ruler is its ability to easily switch between measurement units including centimeter, millimeter, and inch. The app also has a camera ruler that is beautiful, friendly, and easy to use. Moreover, it offers a lot of different measurements and alignments that help you obtain the most accurate measurement results.