Rulercm inch is a free screen ruler app for Android that supports centimeter and inches mode. It allows users to accurately measure the length of objects on their phone screen. The app claims to be accurate for most devices, but for those that do not fit in the distance, it can be adjusted using the Ruler distance control found in the menu key.

The app is easy to use and provides a convenient way to measure objects on the go. It is particularly useful for those who need to measure objects frequently but do not have access to a physical ruler. Overall, Rulercm inch is a handy utility tool for anyone who needs to measure objects on their Android device.