Fitbit has introduced new trackers, including the $79.95 Ace 3 and $229.95 Ace LTE, designed for kids and parents alike. The Ace 3 is a basic tracker with battery life improvements and no GPS or heart rate tracking. The Ace LTE adds built-in LTE, real-time GPS tracking, and parental controls via the Fitbit app. While the devices offer features to encourage physical activity, concerns about privacy and data deletion after 24 hours for location data and 35 days for activity data remain.

Source: https://www.theverge.com/22982833/best-fitbit-watch-fitness-tracker