It doesn’t sound like much of an iOS 7 bug — swipe this way, launch such-and-such app, double-tap that button, slip iOS’s surly security bonds — but if you tend to believe the “lock” in Lock Screen ...
iOS provides developers with an API to lock apps with Face ID or Touch ID. However, not every app has this option, and there’s no way to completely hide apps from your device. Luckily, “App Lock” is a ...