The Fitbit Alta is a simple, wrist-mounted fitness tracker that is small and easy to use. This thin tracker offers plenty of features in a tiny form factor, as well as customizable bands to match your style. While this model did perform about average in our test, the next model up, the Fitbit Charge 2 has a whole host of additional features for only a couple bucks more.
Fitbit has released an update to this model of fitness tracker, the Fitbit Alta HR, adding more refined sleep tracking metrics, continuous heart rate monitoring, and the list price to $150. However, this wouldn't completely offset the Alta's overall mediocre performance in our test, keeping it from winning an award. This model might be something to consider if you want the slimmest possible item that will measure your heart rate.