He revived the Android menu button. The root is not necessary.
Let’s recover the application menu display.
There are also other buttons. (Home, back, power)
You can use it as an alternative to the broken physical button.
+ Menu button display
+ Registration of the application to use
+ Customize the buttons to your liking
(Size, transparency, color, icon, position)
+ Button can be added freely.
+ You can customize the touch behavior and press and hold

Supported Android
(4.1 and up)
Jelly Bean (4.1 – 4.3.1),KitKat (4.4 – 4.4.4),Lollipop (5.0 – 5.1.1),Marshmallow (6.0 – 6.0.1),Nougat (7.0 – 7.1.1),Oreo (8.0-8.1), Pie(9.0)

Download Menu Button (No root) 4.0 APK Unlocked

Menu_Button_Pro-v4.0_build_69.apk