Upon unlocking your iPhone or iPad, an aesthetically-pleasing animation brings all your Home screen's icons into view. On the other hand, pressing the side button to lock your device results in an instantly-black display, as if Apple never intended to incorporate a locking animation into iOS.
If you wish your handset’s locking animation had a bit more spunk than it does out of the box, then you’ll come to appreciate a free jailbreak tweak dubbed LockAnim by iOS developer Julio Verne. Just as the name implies, this tweak brings a bevy of new locking animations to the table, giving you a lot more choice in what you see when you press that side button on your handset.