Fitbit One®

Activity + Sleep Tracker

All-Day Activity

Track steps, floors climbed, distance, calories burned & active minutes.

Clock + Display

See daily stats & the time of day on the OLED display.

Sleep Tracking + Silent Alarms

Track your sleep quality & wake up peacefully with a silent alarm.

Wear Anywhere

Small, comfortable clip fits securely onto clothing so you can wear your tracker during every occasion.

Long Battery Life

Battery life up to 10 days so you can track all day and night without needing a charge.*

Wireless Syncing

Sync stats wirelessly & automatically to computers and 200+ leading iOS, Android and Windows devices.

*Battery life and charge cycles vary with use, settings, and other factors; actual results will vary.


What's Included

  • Removable Fitbit One tracker
  • Fitbit One silicone clip
  • Charging cable
  • Wireless sync dongle
  • Fitbit One Sleep Band

Sensors & Components

  • 3-axis accelerometer
  • Altimeter
  • Vibration motor


  • OLED display
  • Push the button to cycle through daily stats

Battery and Power

We recommend charging your Fitbit One weekly to ensure you are always tracking.

Battery life up to 10 days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary.

  • Battery type: Lithium-polymer
  • Charge time: One to two hours
  • Radio transceiver: Bluetooth 4.0


  • Saves 7 days of detailed motion data – minute by minute.
  • Saves daily totals for past 23 days

Water Resistance

Fitbit One is sweat, rain and splash proof. However, the device is not swim proof. With any clip-based wearable device, it’s best for your skin if the clip stays dry and clean.


You can clip Fitbit One to a belt, pocket or bra. Always use the silicone holder when clipping it to a bra or waistband as the plastic Fitbit One tracker is not meant to be worn in direct contact with the skin. Make sure the Fitbit One display faces outward when clipped to your bra. Learn more.


The Fitbit One tracker is made of thermoplastic. The Fitbit One clip is made of silicone and metal.

Environmental Requirements

  • Operating temperature: -20° to 45° C
  • Maximum operating altitude: 9,144 m


Fitbit One syncs automatically and wirelessly to computers and 200+ leading iOS, Android and Windows devices using Bluetooth 4.0 wireless technology.

  • Syncing range: Up to 6.1 m
  • Syncing to computers requires Internet connection and USB port
  • Syncing to mobile devices requires Bluetooth and Internet connection
  • Syncs with Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices

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