There are many applications that let you find your friends nearby; Cloak does the exact opposite and gives you the tools to avoid those you’d rather not run into. Created by former Buzzfeed creative director Chris Baker, Cloak lets you tag some of your friends as “undesirables” (say a nasty ex, or that creepy guy at the office that you have no choice but to work with) and then keeps track of their whereabouts through their own check ins and public geo information. If you happen to wander within a preset radius of their known location, Cloak notifies you and gives you the chance to run away.
The tagline is “incognito mode for real life” and we’re kind of really digging the idea. It’s free, although iOS only at the moment.