When you stop the payments, the subscription ends.
- To stop the payments on Android,
https://play.google.com/store/account and find Grosh under subscriptions and tap Cancel subscription.
- To stop payments on iOS, Settings > iTunes & App Store and tap your Apple id at the top. Then tap View Apple ID and then choose Subscriptions. You need to cancel the subscription at least 24 hours prior to the next subscription period starts. Read more at https://support.apple.com/en-us/HT202039
If you’re a Premium user, the app will regularly check for valid subscription receipts from iTunes or Google Play – if there’s no paid subscription covering today, the premium features will be disabled.