Asset Store link
This package enables the Android Immersive Mode that was introduced in Android 4.4.
This mode allows your Unity game to run full-screen on Android devices, hiding the stock navigation bar. With this package, you can enter and exit the immersive mode whenever you want.
There is a free demo available on the Play Store.
Android...
[RELEASED] Immersive Mode for Android
This package enables the Android Immersive Mode that was introduced in Android 4.4.
This mode allows your Unity game to run full-screen on Android devices, hiding the stock navigation bar. With this package, you can enter and exit the immersive mode whenever you want.
There is a free demo available on the Play Store.
Android...
[RELEASED] Immersive Mode for Android