If you don't have a Ruler in your app, download this one now! It's simple but useful. You may never think of having a ruler in your phone. But you will find it necessary and irreplaceable. How to use: Open the app and place it on the device screen or just next to it. By moving each line limiter one after another you can get the most accurate measurement.
Get the .apk setup package of Ruler 1.2 that is free of charge and take a look at users' reviews on Droid Informer. The file size is 99 KB and the app is designed for Android 3.0 and higher. According to the antivirus report, this application is safe and secure. The tool has been originally created by Mobile Manager and it is listed among the Productivity category.