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Over the years we’ve seen a number of “check-in” services offering daters an easy way (sometimes) to set an alert and ensures someone is notified if a date goes south. Bluelight is a free iPhone app that notifies friends and family when a user doesn’t arrive at his or her destination as planned.

Created by Chicago-based Sandbox Industries, Bluelight users begin by telling the app how much time they need to get to their destination on a particular occasion, such as a late-night trip home. They also designate a friend or family member for the application to contact if it’s necessary. Then, assuming they arrive at their destination as planned, they simply check in with Bluelight and their contact won’t be bothered.

Bluelight is available for free download from Apple’s App Store.

More at Springwise.