Android Device: Just delete the app from the device and. not additional steps needed.
Standard Mode: If your iOS device is standard mode (VPN only, no MDM), then all you have to do is delete the app
Advance Mode: If your iOS device has ZenScreen MDM installed, then you have to delete the app AND have to follow this extra step:
Go to setting > General > Device Mgmt > ZenScreen Profile and then click "Remove Management".