Developers have no authority to either check or collect users' information and cancel subscriptions for users directly, users have to cancel subscription in their own accounts.
For subscriptions made through Google Play Store, please manage your subscription in Google Play Subscriptions.
- On your Android phone or tablet, open the Google Play Store .
- Check if you're signed in to the correct Google Account.
- Tap Menu. Subscriptions.
- Select the subscription you want to cancel.
- Tap Cancel subscription.