To cancel directly inside the PassPass app, here is a short video instruction.

If you are wanting to cancel a membership within Apple or Google, here are some reference articles for how to do this

Cancel In Apple App Store

https://support.apple.com/en-us/118428

Cancel in Google Play Store

https://support.google.com/googleplay/answer/7018481?hl=en&co=GENIE.Platform%3DAndroid