A short look at the greatest Fitbits The Fitbit Versa 3 is our pick for the finest smartwatch overall. The Fitbit Charge 5 is the best fitness tracker. The Fitbit Inspire 2 has the longest battery life. The Fitbit Sense is the most advanced wearable in terms of its features. Best affordable: Fitbit Versa 2. The Fitbit Ace 3 is the best option for children.