OBD GPS trackers are one of the best options for monitoring teen drivers because they plug directly into the vehicle and provide accurate driving data. These trackers can send alerts for speeding, hard braking, sudden acceleration, and unsafe driving behavior. Popular OBD GPS trackers for teens include Bouncie, MOTOsafety, and Vyncs. Many parents prefer OBD trackers because they are easy to install and do not require professional setup. They also provide real-time location updates and trip history.