Free download Knock Lock APK for Android, PC. Latest version is 1.12, update at October 4, 2015
Knock Lock version 1.12 is only one variant.
Pro version available here: https://play.google.com/store/apps/details?id=pl.damianpiwowarski.knocklock.pro - with floating Knock Lock! This app alows you ONLY to lock device. Unlock feature is available in my other app - Knock Unlock (beta,...