Two straps Large and Small
Track steps, distance, calories burned & active minutes
Style the slim, removable tracker your way with Flex accessories from Fitbit and Tory Burch
See LEDs light up as you progress toward your daily goal
Water-resistant wristband with a 5-day battery life*
Sync stats wirelessly & automatically to leading smartphones and computers
Monitor your sleep automatically & set a silent alarm
Stay focused on your goals and get motivated to be more active with Flex—a slim, stylish device that tracks all-day activity like steps taken, distance traveled, calories burned and active minutes.
Flex lets you see how every day is stacking up with LEDs that light up like a scoreboard as you get 20% closer to completing your step, calorie or distance goal.
Fitbit Flex automatically tracks how long and how well you sleep—no tapping necessary—so you can monitor your sleep trends without interrupting your nighttime routine. It also includes a silent, vibrating alarm to make your wake-up call more peaceful.
Style your Flex tracker with bright accessory bands, or turn it into a fashion piece with our exclusive Flex collection from Tory Burch. To change bands, simply pop the slim Flex tracker out of your wristband and slip it into the accessory that fits your personality.
View your progress and analyze your trends with
easy-to-read charts and graphs
Invite friends and family to share stats, send cheers
& taunts, & compete on the leaderboard
Log food fast with a barcode scanner, calorie
estimator, meal shortcuts & expanded food database
Log workouts, see a monthly exercise calendar, & use MobileRun to track run stats and map routes
Get goal progress notifications & celebrate
fitness milestones with badges
Set sleep goals, review sleep quality
& see weekly sleep trend graphs
Flex has been tested up to 1 ATM meaning it is sweat, rain and splash proof. However, the device is not swim proof. We also recommend taking Flex off before showering because, as with any wearable device, it’s best for your skin if the band stays dry and clean.
If the band gets wet or if you sweat in it, remove and completely dry the band before putting it back on. Clean the band with a mild soap-free cleanser like Cetaphil Gentle Skin Cleanser or Aquanil. Give your wrist a rest by taking the band off every now and then. Learn more.
The Flex wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. Flex also has a surgical-grade stainless steel clasp.
We recommend charging your Flex every few days to ensure you are always tracking.
Flex syncs automatically and wirelessly to tablets, computers and 150+ leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology.