You can monitor your subscriptions in your personal profile. To do so, simply follow these steps:
If you subscribed via the App Store, you will need to cancel it through your Apple ID account settings. Please follow these steps:
If you are looking for other ways to cancel an iOS subscription, please visit Apple's official instructions.
If you subscribed via the Google Play, please follow these steps:
If you are looking for other ways to cancel an Android subscription, please visit official Cancel, pause, or change a subscription on Google Play guide.