Q: Why do u need my account information when the app is free

Is it an account that you've just created ? If it is, then unless the instructions on this page are followed when creating an account : http://support.apple.com/kb/HT2534

then credit card details need to be entered before the account can be used to download any item from the store.

If you are being prompted to review your account then you could see if this post by mountaingoatgirl lets you do so without needing to enter credit card details : https://discussions.apple.com/message/24303054

If not then you should be able to remove the card's details after entering them. Requesting them is a way of proving that you are able to download content from that country's store