Do Fitbits count steps accurately?

Do Fitbits count steps accurately?

Your Fitbit uses a three-axis accelerometer to count how many steps you take each day, converting recorded motion into reviewable data. Fitbits are often less accurate in tracking distance travelled and calories burned, but the step counter is considered reliable.

Why is Fitbit inaccurate?

Comparative results from rest and exercise, including jump rope, treadmills, outdoor jogging and stair climbing, showed that the Fitbit devices miscalculated heart rates by up to 20 beats per minute on average during more intensive workouts. ...