Precise Ruler is a free Android app developed by STK Company in the Utilities & Tools category. This app is designed to help you measure length without a physical ruler. With a precision of 0.1mm, Precise Ruler can be used in school, office, or anywhere you need to measure something.

Using Precise Ruler is very easy and convenient. You don't need to carry a ruler in your bag anymore, just launch the app on your phone and start measuring. The app provides accurate measurements, and you can switch between metric and imperial units depending on your preference.

Overall, Precise Ruler is a useful app for anyone who needs to measure length on a regular basis, whether it be for work or personal use. It is user-friendly, free, and provides accurate measurements with a precision of 0.1mm.