'SimplePasscodeButtons' Lets You Hide Letters and/or Numbers From the Passcode Keys
If you use a passcode on your iOS device, then chances are you want to keep your information secure from unwanted eyes. In addition, if you use an iOS device, then you can probably appreciate a simple interface that combines both function and simplicity.
A new free jailbreak tweak called SimplePasscodeButtons
by iOS developer Adam Spindler makes it so that you can customize what appears on your passcode keys when your Lock Screen prompts you for a passcode. As shown above, you can hide or show the letters from the passcode keys, or both the letters and the numbers.
From a simplicity perspective, you might want to disable the letters so that only the numbers appear on the keys, but if you're looking at this from a security perspective, you may want to hide everything just to make the passcode screen look more intimidating, because then, people looking over your shoulder won't see the numbers you tap on; most people are paying attention to the numbers you're tapping, and not necessarily the position of the button on your screen, so by hiding the numbers, you may confuse someone trying to spy on your passcode.
SimplePasscodeButtons is available for free in Cydia's BigBoss repository and has no potions to configure. The tweak is only compatible with iOS 7 devices.
iPhone 5 running iOS 7.0.4