This device, which combines a music player, watch, activity tracker, and GPS, was designed for runners, cyclists, and gym-bunnies who don’t want to take their smartphones along for the ride. The TomTom Spark will track your daily activities, such as step taken, active minutes and calories burnt. The data can be seen throughout the day on the large screen. It also tracks sleep but fails to offer data on deep sleep, sleep quality or advanced metrics.