Ruler content rating is Everyone. This app is listed in Tools category of app store . You could visit Xalpha Lab's website to know more about the company/developer who developed this. Ruler can be downloaded and installed on android devices supporting 16 api and above.. Download the app using your favorite browser and click on install to install the app. Please note that we provide original and pure apk file and provide faster download speed than Ruler apk mirrors. Versions of this app apk available with us: 3.6.2 , 3.6 , 3.6 . You could also download apk of Ruler and run it using popular android emulators.