This is an virtual Ruler that can be adjusted to an actual size. It is a mini tapeline app and scale ruler app. You can measure any object with red line using this app. Measure length in millimeters and inches! Before you use it, please set the real inch or millimeter to your own device. You can calibrate a ruler using calibration button on right side down.
The security report reveals that the app is safe. Khtsxr is the creator of Ruler that can be found in the Tools category. Google Play displays that this application is rated 3.9 by its users.