Rarely works and causes a headache. The tracking is substandard and fails to recognize devices that are literally in my bag next to me. On top of that, the Tile app keeps randomly turning my Bluetooth off in an attempt to "restart" and regain lost connection...but it doesn't turn my Bluetooth back on so not only is the Tile app unable to track my Tiles, all my other Bluetooth devices including my watch lose connection throughout the day as well.