Tap on the Settings button in the top toolbar to reveal the Settings & Preferences screen. Then tap on Subscription in the sidebar on the left. Here you can manage your subscription to FotoMagico.
If you do not have a subscription yet, then tap on a Subscribe to button of your choice, and then log in to the App Store to make the in-app purchase. Follow the instructions and you will be ready to use the app in a couple of seconds.
If you already have a subscription, but would like to switch to a different payment schedule, e.g. from yearly to monthly, then simply tap on the appropriate Switch to button and follow the instructions.
If you already have a subscription, but it is not listed as active here, then tap on Restore Purchases. If that still doesn’t help, then tap on Go to App Store and check your purchases in the App Store. This is also where you can cancel an existing subscription.