New iOS app Don't Leave It! does one thing well

There are Bluetooth trackers and GPS chips to help us locate missing items. But Don’t Leave It!, a recent iOS-only app, takes a preventative approach. The free app reminds you not to forget something.Let’s say you’re notorious for leaving home for the gym without your earbuds. While at home, choose the ‘earphones’ icon in the app. Choose the distance, from 30 to 240 feet, at which you want to be reminded. Anytime you move beyond that distance (with iPhone in tow, of