Kicking off this week’s must-have apps list is a new to-do app called Checkmark, which is being labeled the reminders app Apple should have made. There’s also a great new video sharing service called Vyclone, a unique clock app, and more.

Early last year, Apple applied for a patent which described how they could add a “wild new dynamic screen saver system that could sense the environment it is in and in a chameleon-like fashion automatically change the screen saver.”

Clumsy wording aside, I loved the idea from the get go. Imagine, docking your iPhone at night, only for the screen to perfectly match the decor of your bedroom. Unfortunately, like most of Apple’s patents, there’s no telling when or even if Apple will ever actually roll out such functionality.

Luckily, we don’t need to wait for Cupertino to get off their duffs, because Chameleon Clock is here to turn our iPhones and iPads into chameleons for us.