You can plug in a controller to your android or amazon device or you can use it wireless as long as your device has bluetooth on board or you have a dongle that pairs to the controller.
To use your controller in the app, goto: Settings – Gamepad – Gamepad 1 and activate the controller
A few popular controllers that work.
PS4 Controller – To connect via bluetooth, turn off your PS4 at the plug and hold share an options until the blue light flashes, then open android settings – bluetooth an scan then connect.
XBOX controllers – On your Android phone, open Settings and head to the Bluetooth menu. Turn on the Xbox One controller by holding the Xbox button. Look for the sync button on the top left of the Xbox controller. On your Android phone, scan for nearby Bluetooth devices.
Ipega 9076 – Plug in your dongle located under the flap, press Select and Home together to connect.
Don’t forget when you set your controller to bluetooth, activate it in the app as above.