Fitbit Zip Ionic Faq page 4

How accurate is my heart-rate data on my
Fitbit device?
For more information, see
How accurate is my GPS data captured by
my Fitbit device?
All devices with GPS sensors require a direct path to GPS satellites to calculate location. A weak
GPS signal might affect the accuracy of your route and other activity data. Your device uses your
step count to calculate distance until it finds a signal, so the total distance calculated for a
workout may be slightly less accurate when GPS isn't available for the entire time.
To learn more, see GPS.gov.
How can I get the most accurate reading on
my Fitbit scale?
To improve the accuracy of your scale's readings, try the following:

If you pick up and move your scale between measurements, or store it sideways against a
wall when not in use, the scale will calibrate the next time it's used. You may need to
weigh yourself 2 or more consecutive times before the scale calibrates and shows
consistent measurements.

Place your scale on a hard surface during use. Carpet, linoleum, or any other flooring
with resilience may affect the accuracy of the scale's readings.

Your weight and body fat percentage naturally vary over the course of a day and can
change based on what you eat and drink as well as your body stance, age, height, level of
exercise, and perspiration. For consistency, weigh yourself first thing in the morning
before eating, drinking, or exercising. If you're wearing clothes, dress lightly and remove
your shoes and socks.

Your body fat percentage may be affected if you weigh yourself while holding a heavy
object.

If you turn lean mode on or off, your body fat percentage reading can be affected. For
more information, see

For the most accurate BMI and body fat percentage result, your height, age, and sex must
be correct in your Fitbit profile. To update your profile, choose a section below:
o
Fitbit App
How do I track my heart rate with my Fitbit device?
About Fitbit Aria 2.