Unable to purchase from app store

If you can't make purchases or update apps, including free apps, you may need to have a valid payment method on file, even if the app you want to download is free.

See -> Add a payment method to your Apple ID

Add a payment method to your Apple ID – Apple Support (UK)

• If you want to change your card, add first the new card, then remove the old one.
• or if you use your Apple ID balance, set your Apple ID balance as your default payment.

If you update your payment method or add funds to your Apple ID balance, It would take about 1 to 3 business days in order to process.

If you're still unable to update your payment method, Contact Apple Support.

Access to the App Store requires payment credentials.

Every download is registered on your account and the payment method is a vital part of your access to those downloads.

Click ▶︎ Add Payment Method. 

Click ▶︎ App Store User Guide. 📖