It was consistently rumored that Apple will introduce a fingerprint scanner with the iPhone 5S, and that did happen. However by default the Touch ID scanner is limited to either locking or unlocking the device or authorizing purchases through Apple’s content stores. Users would have liked the ability to secure individual apps using the fingerprint scanner, but Apple hasn’t introduced that feature now, though it hasn’t denied the possibility of a feature like this making it to iOS in the future.
With the recent release of iOS 7 untethered jailbreak, a whole new world of tweaks and customizations was opened up for all the new Apple mobile devices, which include the iPhone 5S. AppLocker is a jailbreak tweak that has been around for quite a while, previously it let users simply add a passcode lock to individual apps. Its latest update brings the ability to lock a single app using the Touch ID fingerprint scanner. Users won’t be required to go through a complicated setup process, the tweak will simply use the fingerprints already saved in the device during the initial Touch ID setup.
Nevermind that the fingerprint scanner is only found on the iPhone 5S. Those with other iOS 7 devices can also use this tweak, but they’ll have to use a password to lock apps. AppLocker is available right now in the ModMyi Cydia repository for $0.99.