No, you can not.
No, you can just use your own credit card.
Go to the app store and use you iTunes card to get apps
You can use an iTunes card for purchasing apps at the app store. Maybe your card still has a value of $40 because you downloaded a free app.
Nope too bad
No. You need an Apple App Card to purchase Apps from the App Store!
Yes, you can purchase gems for DragonVale using an app store card, as it allows you to add funds to your app store account. Once the funds are available, you can use them to buy gems directly through the game. Just ensure you have enough balance in your app store account for the desired gem purchase.
In the iTunes or App Store apps and you can purchase an iTunes gift card from mtcgame. They have the best prices
To add app store credits, open the App Store on your device and scroll down to your account profile. Tap on "Redeem Gift Card or Code," then enter the code from your gift card or credit. If you received the code via email, you can also use the "Redeem" option to enter it directly. Once added, the credits will be available for your purchases in the app store.
At the store
As a consumer, you don't start out with a 'freebee' or credit balance. Most App Store accounts have a credit card attached to them, and are limited only by the credit card's credit limit. If you use an Itunes or App Store gift card, it is a credit based on the value printed on the card. As a developer, you only make money when a paid app sells. You get 70% of the selling price you set. Apple gets the other 30% for hosting the app, approval and quality control and account management.
Yes, you can use iTunes Gift Card money.