You can download free apps, but you may need to have a valid payment method on file, even if the app you want to download is free.
Free apps has also In-app pruchase.
See -> Buy additional app features with in-app purchases and subscriptions
Buy additional app features with in-app purchases and subscriptions
See also -> Apple Media Services Terms and Conditions
Legal - Apple Media Services - Apple
See -> If you can’t download or update apps on your iPhone or iPad
If you can’t download or update apps on your iPhone or iPad – Apple Support (UK)
scroll to point 2 ⤵️
Add a payment method
You may need to have a valid payment method on file, even if the app you want to download is free.
Add a payment method
- If you want to change your card, you need to add first the new card, then remove the old card.
- or if you want to use your Apple Account balance, you need to set your Apple Account balance as your default payment.
If you still need help, get support from Apple directly -> Get Support or call Apple in your region see -> Contact Apple for support and service