How do I delete my account?
To delete your account, you can take the following steps;
Settings -> Application Settings -> Delete My Account
How do I cancel my Google Play subscription?
You can find detailed information about your Google Play subscriptions here: https://support.google.com/googleplay/answer/7018481?co=GENIE.Platform%3DAndroid&hl=en
How do I cancel my iTunes subscription?
You can find detailed information about your iTunes subscriptions here: https://support.apple.com/en-us/HT202039
How apps, content, and subscriptions from Apple are billed (Multiple items might be grouped onto one bill)
Please check Apple help page for detailed information: https://support.apple.com/en-us/HT201359