Locklet is a mobile platform that lets you conceal your image in an artistic manner (e.g. blurring or mosaic effect) such that your friends can't see the original content of the photo. You can add a "hookline" to tease them, making them curious and guessing at what it is about. Of course, your friends have the ability to unlock them, but only if they choose to spend their precious "keys". So you can ability to be mysterious and playful with your friends through photo interactions.