Cloak uses location data from Foursquare and Instagram to let people steer clear of their exes or acquaintances.

Let’s be real – few people using apps like Foursquare or the iPhone’s ‘Find My Friends’ app are actually looking to run into their friends. Most of the time, they’re showing off the cultural currency inherent in their current location – until they receive news of an undesirable person, such as an ex, approaching, at which point they flee. That’s the premise behind Cloak, which alerts you whenever certain people are nearby using data pulled from their Foursquare and Instagram – with the goal of avoiding them. “For instance, if you really hate John, Cloak can buzz you when he’s within a ten-mile radius,” writes Nicholas Tufnell at Wired UK.

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