@robin

I understand that you are looking to cancel/change your Fing App subscription.

Depending on whether you purchased from the Appstore or Playstore, you can cancel using the following links:

Link for Apple (Appstore): https://support.apple.com/en-us/HT202039

Link for Android (Playstore): https://support.google.com/googleplay/answer/7018481?co=GENIE.Platform%3DAndroid&hl=en

I hope this helps.