Is payment secure? Does the app store my credit card information?

We use payment services by Stripe which securely clears all payments for photobooks in the app. Payment details like AppleID or credit card numbers are entered through the Stripe module, encrypted and never stored. Because of this, each time you purchase a photobook, you will be required to enter your credit card information. Stripe has an payment identity service called Link. If you have a Link account, you will be offered the opportunity to login and pay using your payment information stored by Stripe via your Link profile.