touch ID- is without question the favorite function of iPhone 5S, at least for me, and the component that we have been waiting for a very long time allows us to make purchases from iTunes Store using fingerprints instead of passwords. Basically, after registering a fingerprint, authentication with a Apple ID and after activating the purchase option using the fingerprint, every time the App Store will ask for a password to download a new application/redownload an old one, a simple touch of the fingerprint reader will authenticate the purchase.
An alert like the one above will always be displayed on the screen, with the option to enter a password for authentication, but who needs them when the finger is enough? To be honest, all mobile platforms should include the exact same payment authentication system and probably will soon.
