screen your phone or tablet too large, you need use a navigation bar but it is quite difficult. navigation bar will help to behavior easy with navigation bar on your device. [featured] ✔ support virtual navigation key with: + back key(not root). + home key. + recent task key. + show notification. + lock screen key easy move on screen ✔ auto hide when you don't use ✔ start on boot app. [guide user] ✔ enable "show virtual navigation bar". and after enable accessibility for the app. ✔ long press icon arrow moves to hide navigation bar after tap notification to show again. ✔ double tap arrow move icon to quick open recent task note! ✔ this app uses the device administrator permission to you can use the shortcut screen off on virtual navigation bar(this feature uses to lock the sc