Please unsubscribe from the app stores for each platform you have paid for.
Please refer to each store’s support page for cancellation instructions.
App Store:
https://support.apple.com/en-us/HT202039
Google Play:
https://support.google.com/googleplay/answer/7018481?hl=en
There is no automatic renewal for annual subscriptions, so you don’t need to go through the cancellation process.