does app store accepts debit cards

Yes! 🙂

You have to set that up in your iTunes account information if you haven't done so.

Launch iTunes on your computer, then from the menu bar click Store / View My Account / Edit Payment Information.

While the iTunes store does accept debit cards, I would advise you to NEVER associate your debit card to any store like the iTunes store. If something were to go wrong(rare), you could find yourself with NO MONEY in your account, and yourself waiting weeks to get such straightened out. A credit card or gift card is a much better choice.