Nokia's Treasure Tag (review) is a simple, easy-to-use tracker that connects your smartphone (Android and iOS as well as Windows Phone) to whatever the tag is attached to -- your keys, a bike, your car, a diaper bag, whatever.
The app manages up to four tags, which come in a variety of colors. To start, you can either turn on Bluetooth to pair the devices, or tap an NFC-capable phone to the module.
Next, you'll assign a name and tag type. You can attach a tag to anything, but the app gives you 12 common examples.
You'll have the option to get notifications when you break the Bluetooth range or turn them off. Alerts will pop up in your notifications shade.
You can also alter notifications from the phone's system settings.
You can turn vibration on or off, and choose the alert sound you hear.
With notifications turned on, you'll receive word any time your tag wanders off too far.
After setting up the tag, management is simple. You see when you're connected, and have a few options from there.
If you disconnect, like if you're out of range, you can tap the double-arrow button to try to reconnect.