How do I cancel a subscription?

Canceling a Burner subscription is no different from canceling a subscription to any other app on your phone. 

You can find instructions on how to manage your subscriptions here:

iPhone: https://support.apple.com/en-us/HT202039

Android: https://support.google.com/googleplay/answer/2476088?hl=en

If you subscribed via the web, you may cancel your subscription by logging into app.burnerapp.com.