Smart Ruler is an Android app developed by Smart Tools co. (12th floor, 126 Beomeocheon-ro, Suseong-gu, Daegu, Republic of KOREA). Others apps created by Smart Tools co. are: Smart Distance, Smart Measure, Metal Detector, Smart Protractor, Speed Gun, Unit Converter.

Smart Ruler first became available on 13 Jun 2010. It is estimated that Smart Ruler has been downloaded between 1000000 and 5000000 times from the Play Store.

Smart Ruler 1.5.9a requires the following permissions:

Allows applications to access information about networks.

Allows applications to open network sockets.

Allows access to the vibrator.

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