Ruler is an Android app developed by KHTSXR. Others apps created by KHTSXR are: LED Scroller.

Ruler first became available on 21 Nov 2013. It is estimated that Ruler has been downloaded between 100000 and 500000 times from the Play Store.

Ruler 6.0 requires the following permissions:

Allows applications to access information about networks.

Allows applications to open network sockets.

Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.