The XY-FindIt app, used in combination with special radio-frequency tags, alerts a user when a possession is no longer in range of the user’s smartphone.

The XY-FindIt app, used in combination with special radio-frequency tags, alerts a user when a possession is no longer in range of the user’s smartphone. Photo by Webble

People who tend to lose their wallets, tablet computers and key fobs have a friend in downtown San Diego...

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