Screen your phone or tablet too large, you need use a navigation bar but this think 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.Easy move on screen Auto hide when you don't use Start on boot app.[Guide User] Enable "Show Virtual Navigation Bar". Double tap icon arrow move to hide Navigation Bar after tap notification to show again. Long Press arrow move icon to open app.Note! To use app, please enable Accessibility for application. When application killed. Please wait for a few second to application initialize Service again and you can use it.Navigation Bar is application free. Setup and enjoy!.If you like Navigation Bar app don't forget rate 5 star ★★★★★ or review. They are appreciate for me. Thank you so much。