I just want to start by saying I lose my keys all the time. I usually end up finding them, but it is usually only after a long tortuous search. And then comes along the hipKey ($90). The answer to my prayers. The hipKey works with your iPhone and has five useful modes. It will tell you when the hipKey or your iPhone are too far away from each other. You can set it to alarm when moved. You can use it to find your iPhone or visa versa. You can turn the alarm off and you can put the hipKey in your child’s pocket and it will tell you when they’ve traveled too far. The hipKey is available from the Apple Store.