Purchases are made through your device's app store and are paid using one of the methods available in that store.
Google Play:
▪ Open the Google Play app on your device and tap the profile icon in the top right corner;
▪ Select “Payments & subscriptions” → “Payment methods”.
The browser version of the page is available at the following link.
App Store:
▪ Open the “Settings” app on your device and tap your name;
▪ Select “Payment & Shipping”.
The browser version of the page is available at the following link.