App Store
If you've purchased on App Store, you may go to the Settings app and manage your subscriptions. Please refer to this Apple help center article for more info.
Google Play
If you've purchased on Google Play, you may go to Google Play app and manage your subscriptions. Please refer to this Google Play's help center article for more info.
Notewise website / Stripe
If you've purchased on Notewise's website (via Stripe), you may tap here to manage your subscriptions.