At the end of 2012, we showed you a tweak called Binary Clock
that allowed you to replace the Lock Screen's digital clock with a binary clock. If you liked this tweak, the unfortunate news is that it's not compatible with iOS 7, but a new jailbreak tweak called Binary Clock 7
by iOS developer Gilles PETIT is now available that will give you the binary clock on your iOS 7 Lock Screen again.
The binary clock is shown in the screenshot above. Not everyone knows how