Since we're all so keen to broadcast our every move and allow a variety of apps to track us there has been an explosion of interesting location-based services. However just as you can now see where your friends are you can also track people you are less interested in meeting. As ever there's an app for this - Cloak. This app allows you to list those people who you have friended in some social network but wish you hadn't. So Cloak can keep tabs on where these unwanted friends are and alert you if they are getting too close for comfort so you can take evasive action. As they proudly announce on their site:
Avoid exes, co-workers, that guy who likes to stop and chat - anyone you'd rather not run into.
Of course the service only works for tracking social media addicts who check in to every cafe, shop, bar or bus stop they visit. Cloak tracks people on Facebook, Twitter, Foursquare and Instagram. So download it from iTunes Appstore ... or not.