Canceling a Subscription

Apple manages all App Store payments and subscriptions. Shutter Clique cannot cancel a subscription on your behalf. You must do this yourself under the iTunes / iCloud settings on your device. Look under Settings > [Your Name] > Subscriptions on your device and cancel your subscription from there.

Note that this also means that if you have any charge disputes or refund requests then those should be directed to Apple. You can do this from their Report a Problem site.