I want to make sure my users won't have a bad experience if I cancel my account and they're still using a version of my app that includes Sentry.

Typical usage of Sentry will not result in any customer facing behavior should you decide to cancel your plan or cease using the tool.

The SDK should run as normal if you cancel your account, and events sent to Sentry will be rejected. We still recommend removing Sentry configuration from your application.