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Can I Use My Own Payment Method With Family Sharing? [Solved]
Members of your family group can elect to use the shared payment method, or they can continue using their own payment methods such as a Google Play gift card. You can set up a Family Library by opening the Google Play Store app and by tapping on menu followed by Account > Family > Sign Up for Family Library.
Apple: How do I use my own money for purchases rather than using family sharing data?
Apple: How
How Family Sharing works — Apple Support
With
Turn OFF Purchase Sharing in Family Sharing on iPhone
How to Turn OFF Purchase Sharing in