Where’s my wallet? TrackR wallet is a credit card sized tracking device for wallets, bags, keys, and more! Slip TrackR wallet inside a wallet or attach it to any item. Using your iPhone or Android, you can quickly locate you missing items around the house or on the go. You can cause your missing items to ring or locate them on a map using Crowd GPS technology. TrackR wallet can also help you find your missing phone with a press of a button. TrackR wallet can even remind you before you leave your valuables behind.