While you must purchase an ONMO+ controller bundle to register an account and get access to the service, you are not restricted to playing exclusively with that controller.
ONMO+ Smart Console supports most standard third-party gamepads (Xbox/PlayStation-compatible), as well as on-screen touch controls on mobile devices. However, we recommend the ONMO+ Pro Controller because the in-app UI and on-screen instructions are designed around its buttons and features (Mode LED indicators, Pair, Fn, M1/M2, etc.).