If you're making regular purchases of apps, games, or any other content via your Apple ID, you'll be familiar with the process. But did you know you can add funds directly to Apple ID, ready for use? Here's how.
Making purchases using your Apple ID is super easy, but there might be times where you want to have funds available ahead of time. You might want to set yourself, or someone else, an allowance for apps or games, for example. Adding funds to Apple ID is super easy, and all you need is ad-hoc and much of the time you spend your money.
to get started. Apple ID
To get started, open the App Store on your iPhone or iPad and then tap
Next to the bottom of the screen tap "Add Funds to Apple ID." 
You can now see a series of preset amounts including $ 10, $ 25, $ 50, or $ 100 but you can tap "Other" to enter a custom amount if you wish. Make your selection and tap "Next."
You want to be prompted to authorize the transaction via either Face ID or Touch ID, Depending on the device you are using. If you are using an older iPad, for example-then your Apple ID password will be needed.
Once you've authenticated, The funds will be added to your Apple ID, ready to be used. Any funds added is essentially the same as a gift card.