Fitbit Flex 2 Activity Tracker User Review | GadFit

November 29, 2016

The Fitbit Flex 2 ($99.95) is the slimmest and tiniest activity tracker to be released by Fitbit and for good reasons. It’s no secret people want to track their activity levels discreetly and nothing screams uncool louder than a gargantuan activity tracker that proclaims to the world you’re into fitness tracking.

I had the tiny Fitbit Flex 2 for a while now and here’s what I have to say.fitbit flex 2 -feature-2



  • All day activity tracker – Records steps, distance, calories burned, active minutes, hourly activity and sleep
  • Water resistant, safe for swimming
  • Swim tracking capable. Records lengths, duration, pace and distance of swim
  • Changeable wrist bands and accessories
  • Slimmest Fitbit activity tracker to date
  • SmartTrack – Automatic exercise recognition
  • Call and text notifications
  • Reminders to move
  • Vibration enabled with discreet LED light display
  • Up to 5 days battery life


  • Pricey given the limited features ($99.95)
  • Lack of necklace wearing mode


fitbit flex 2 -front-and-backOf all the activity trackers  I’ve seen, and I’ve used quite a number over the years, the Fitbit Flex 2 is officially the smallest I’ve come across.fitbit flex 2 -in-box-with-itemsThe capsule sized device looks like an over-sized medicine capsule and it’s hard to imagine this tiny morsel is capable of all day activity tracking. We’ve come a long way since the pedometer days!

The charging pins line the back of the Fitbit Flex 2 tracker while the “front” has 5 LEDs; one of which flashes a different colour depending on the notification purpose.
fitbit flex 2 -in-wristbandThere are no buttons to press. A double tap on the Fitbit Flex 2 brings up the LEDs which will indicate the progress for the day, exactly like its predecessor.fitbit flex 2 -slot-in-wristbandThe cire tracker fits easily into the changeable band. The package contains 2 sizes of bands that should pretty much fit everyone.

The activity tracker is waterproof and swim safe. Battery life is listed at 5 days and it’s about right.  Again this will depend on the number of text notifications and vibration alerts you receive in a day. It goes without saying that more alerts equates to shorter battery life span.fitbit flex 2 -charging-cableCharging cable is proprietary with one end that plugs into any standard USB port.


fitbit flex 2 -mobile-app-1The Flex 2 is a capable all day tracker. It records steps, sleep, distance, calories and active minutes in the background while you go about your day.

What I particularly like is the sleep tracking. Honestly I’m amazed at how accurate it is given that it got my sleep tracking duration spot on. As to the quality of sleep, I’d take that with a pinch of salt.
fitbit flex 2 -moblie-app-2Fitbit Flex 2 has the company’s SmartTrack technology; it can recognise exercises such as, biking or walking, among many others, and will automatically log these activities in the Fitbit Mobile app. So the user will not miss out on any physically active moments in the day.

fitbit flex 2 -notification-lights

Fitbit Flex 2 notification lights.

The Flex 2 activity tracker is also vibration enabled for reminders to move, smart notifications such as texts and incoming calls, and silent alarms to wake up to. Each type of notification will cause a different colour LED to blink. For example, idle alerts will blink purple while texts will flash blue. Only the first LED will blink in colour while the remaining 4 LEDs only blink white. It can get pretty daunting initially until you realise the only lights that flash are purple and blue.

Fitbit’s mobile app is the best in its class in the market right now. Data presentation is concise and clear without being too “serious.” You get reward badges for hitting milestones and a weekly summary delivery right to your email. I’ve been on the platform for 4 consecutive years now and it’s pretty awesome really.


The key feature of the Flex 2, besides the activity tracking aspect, is how discreet the device actually is. As such, there’s numerous ways to wear it. Be it as an anklet, bracelet, necklace, perhaps maybe even as a ring! After all the Flex 2 does look like a piece of Onyx if it’s not examined up close.fitbit flex 2 -accessoriesBesides Fitbit’s online store where the accessories for the Fitbit Flex 2 are peddled, there are a few notable online retailers such as Functional Wearables,  fitjewels, and numerous options on Etsy where you might find something to dress up the Flex 2.

What I felt lacking is the absence of options to indicate where the Fitbit Flex is worn. On the Fitbit mobile app, the only options are dominant or non-dominant hand. Strange that necklace wasn’t one of the options since Fitbit is peddling their own line of accessories which include a necklace.

The Fitbit Flex 2 is also the only fitness tracker from Fitbit to be certified swim proof and made to track swimming. It can track swim duration, pace, lengths, as well as distance. This will require a bit of participation on the user’s part in entering the correct pool length.  Fitbit has a FAQ which I found pretty helpful in elaborating the swim tracking features of the Fitbit Flex 2. However, it doesn’t do detailed swim tracking compared to trackers such as Garmin’s Forerunner 735XT.


Fitbit’s smallest tracker goes heavy on the concept of accessorising and throws in swim tracking along with smart notifications. Yet I couldn’t see a compelling reason to recommend this over the Fitbit Charge 2 which at $50 more is a mighty fine fitness tracker. Also, if swimming is high on your list of activities, then the Flex 2 probably wouldn’t cut it with the limited swim metrics.
fitbit flex 2 -feature-2The recommended retail price of the Fitbit Flex 2 is set at $99.95. Throw in accessories and you’re easily looking at 50 bucks more. In my opinion, it’s not exactly a value for money purchase unless it’s on offer. Well I did observe the Flex 2 going for $60 on Cyber Monday on Amazon!

You can purchase the Fitbit Flex 2 at $99.95 from Amazon where there’s usually a small discount, great return policy, and free delivery depending on where you reside. In return your purchase helps to offset the costs associated with the running of this site. Thanks for reading.

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