Gifts card not working
I put a 25 dollar gift card in my phone and I bought something and it worked and when I went to buy more it wouldn’t work when I had 24 dollars left
Question marked as
Did you try to make In-App purchases for a game? Some developers do not accept Apple ID balance as a payment for consumable In-App purchases.
What you can buy with your Apple Gift Card or Apple Account balance - Apple Support
In case you did try to buy other content of apps, did you get an error message?
Do you have ongoing subscriptions?
Is Apple ID balance your only payment method, or do you have another one listed, for example a credit card?