is meant to put an end to teens' use of texting while driving. It automatically locks your teenager's mobile phone when they're traveling over 10mph, and then unlocks when they stop driving. If they're simply texting in the back seat of the car, they can override the lock, but a notification will go to the parent.

is an app that uses geofencing to let you quickly locate your family on a map. You can set boundaries so you are notified about when your kid comes home or if they're leaving a designated zone (like your house).

One weakness with the service is that it is limited to only Android phones for the time being. If your kid has a feature phone or a Windows phone, they will not be able to use the service.

We got a quick hands-on with the service and the interface is clean and easy to use. I'm a little concerned that you can only find it within the Sprint Zone, but Sprint ensured me that customers will be educated about Sprint Guardian when they buy a new phone on a family plan.