Assistive button creates possibility of 15 different gestures by combining tap swipe and hold gestures.
By doing these gestures you can do the functionalities of navigation bar volume and power button and other phone functions.

List of gestures and associated functions:

Tap/Press Gestures
• Single tap > Home button of navigation bar
• Double tap > Recent button of navigation bar
• Long press > Lock the Screen

Swipe Down Gestures
• Swipe down > Open Notification Panel
• Tap and swipe down > Open Quick Settings
• Swipe down and hold > Decrease Sound
• Tap and swipe down and hold > Decrease Brightness

Swipe Up Gestures
• Swipe up > Open Category Apps
• Tap and swipe up > Open Power Dialog
• Swipe up and hold > Increase Sound
• Tap and swipe up and hold > Increase Brightness

Swipe to Center Gestures
• Swipe to center > Back button of navigation bar
• Tap and swipe to center > Toggle Split Screen
• Swipe to center and hold > Toggle Auto Rotate
• Tap and swipe to center and hold > Toggle Brightness Mode

More features
• Customise Assistive button appearance.
• Turn screen on using proximity sensor.
• Keyboard sensitive: Assistive button will move up when keyboard opens.

Note
- This app uses the Device Administrator permission.
- This app uses Accessibility services.