The Fitbit Surge is an excellent activity tracker, especially for the sports functions. Its built-in GPS is great for tracking runs or hike, and there are now multi-sports capabilities for cyclists. Fitbit Surge review.
The more minimal Fitbit Charge HR is also excellent but lacks a GPS.
We have rounded up all the Fitbits in our Which Fitbit is best feature.
Other trackers are reviewed on our best activity tracker test centre.