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How to see or cancel subscriptions on your iPhone, iPad, or iPod touch

1. Open the Settings app. 
2. Tap your name. 
3. Tap Subscriptions. (If you don't see "Subscriptions," tap "iTunes & App Store" instead. Then tap your Apple ID, tap View Apple ID, sign in, scroll down to Subscriptions, and tap Subscriptions.)
4. 
5. Tap the subscription that you want to manage. Don't see the subscription that you're looking for?
6. Tap Cancel Subscription. If you don’t see Cancel Subscription, the subscription is already canceled and won't renew.

See this link to see hot to check your subscriptions --> See or cancel your subscriptions - Apple Support