lgato Smart Key: The Elgato Smart Key connects your key to your iPhone. It gives a notification whenever you leave your key behind and plays a sound to find your key.
Motorola Keylink: The Motorola Keylink connects with your Android or iOS smartphone using the Motorola Connect app and makes it easy for you to find your phone and keys. To find your phone just press a button on Keylink and your phone rings if it’s up to 100 feet away. And to find your keys tab on the app or use the app to see where your keys are on a map. It keeps your Moto X (2nd gen.), Droid Turbo or a phone running Android 5.0, Lollipop unlocked when your keys are nearby.
iro: Hiro is a Bluetooth thing finder that works along with your smartphone, can be used up to 200ft away, and is compatible with both Apple and Android devices. It beeps and alerts you about its location when you press the locate on the smartphone app. And it also allows you to locate your smartphone from the unit itself.
XYFindit: It is a stylish, convenient, and affordable Bluetooth Tracking tag for iPhone and Android smartphones that makes finding things easy. You can attach these tags to your keys, purse, luggage or anything that’s important to you and it syncs with your smartphone and allows you to keep track of all the things. Once you activate Find-It mode, you can track any tag that is within range of your smartphone and an on-screen indicator shows you as you get closer to the tag. If you activate Keep-It mode, your smartphone will alert you if you move out of range of the tag. And in Lost-It mode, you can mark any tag as lost from your smartphone app that allows others to inform you if they happen to see the tag.