Best fitness tracker guide 2018: Fitbit, Garmin Xiaomi and more

If you're looking for a top fitness tracker – be it a activity band, fitness watch or a clip-on tracker – there's no shortage to choose from. Fitbit, Garmin, Xiaomi, Misfit, Polar are the leaders in the game, with bands to suit every budget and fitness level. And fitness trackers are becoming more feature rich…