This is one for the forgetful among us. The Smart Key, from Elgato, is a smart accessory that connects with your iPhone. It lets you know if you have left your keys behind by sending an alert to your iPhone, and through the Smart Key app, you can find the last place your keys were, and you can help locate the keys by making it play a sound. Packaged in a key-ring, it can be attached to keys, cameras, handbags, and other valuables.
The app runs in the background, and uses low energy Bluetooth Smart technology. The safe zone feature also means that you won’t get unnecessary alerts if you’re say home, or at work.
You can also use it for applications such as waiting for your luggage at the airport. The moment your luggage arrives, you’ll get an alert.
Obviously, this is packed with other features such as IP65 certification, and works with iPhone 4s or later, and iPad with iOS7 or later.