If you have been figuring out, lately, how to make a custom lock screen for your iPhone, iPad or iPod touch then the Clock Builder app store app is the right choice for you. This is really a cool app because good lockscreen themes in are very hard to find in Cydia. This app works very well in tandem with the clock builder jailbreak theme from Modmyi repo on Cydia. Not only it lets you make kickass custom lock screen themes, it also lets you download hundreds of free themes. Hit the jump for the complete lockscreen theming tutorial.