If you’d like to cancel you’ll need to make sure you’re on the app on your phone or device.
Go to: Settings > Apple ID > ITunes & App Store > View Apple ID > Subscriptions > find Shpock > Cancel Subscription
Go to: Google Play store > Account > Subscriptions > find Shpock > Cancel Subscription
Your membership will continue for the remaining paid duration and then end. Don’t forget you can sign back up to Premium anytime!