Buzz does not require the use of a mobile phone or any kind of app. 

Neosensory does offer a companion app for Buzz. It will be available for both iOS and Android phones. The Buzz app is currently compatible with iOS 13 and 14 as well as Android 8 to 11.

If you choose to connect your Buzz to the app, you can unlock additional functionality such as Music Mode, Sleeping Mode, frequency range, and vibration intensity controls.