All subscriptions that you buy via the Apple App Store can be managed on your Apple ID web site or in the App Store app. In the App Store it is a bit hidden: 1) Open the App Store App on your iPhone 2) go to the “Today” screen 3) click on your profile picture in the upper right corner 4) click on your profile name 5) scroll down 6) click “subscriptions” 7) click on “Essentials” 8) click “Cancel Subscription”