Your Apple Account balance (from the gift card) will be used automatically before any other payment method. :
The game is a one-time purchase. Tap the price button to buy it. how to buy minecraft with itunes gift card
Use the camera to scan the code on the back of the card or enter it manually. : Search for "Minecraft" in the App Store . Your Apple Account balance (from the gift card)
Confirm the in-app purchase; it will deduct the cost from your Apple balance. how to buy minecraft with itunes gift card
Once the purchase is confirmed, the game will download to your device.
Tap your photo or the sign-in button at the top of the screen.
Tap . If you don't see it, sign in with your Apple ID first.