Fitbit Alta vs Fitbit Charge

As such they can both track your all-day activity including your steps, distance, calories burned, and active minutes. However, the Fitbit Alta HR lacks an altimeter, so only the Charge 3 can track your floors climbed. Something you may not know is Fitbit has enhanced its heart rate technology in the Fitbit Charge 3.

The most noticeable difference is that the Fitbit Alta HR is significantly less wide than the Charge 3. This slimness can make it feel like you're wearing more of a bracelet than a fitness tracker. Another major difference is how you interact with each device.