Jawbone UP3 vs. Fitbit Flex 2 Comparison

Most fitness trackers nowadays can perform a wide range of functions, such as smartphone interaction and physical activity assistance. Yet, they become a vital role in your daily life. What’s on your mind right now may be the consideration between Jawbone Up3  vs. Fitbit Flex 2. Which one is better? Which one should you buy, Jawbone Up3 or Fitbit Flex 2?

Don’t worry. We got your back. In this article, we will layout 6 of the essential criteria for when it comes to choosing a fitness tracker. Also, we will compare head-to-head Jawbone Up3  vs. Fitbit Flex 2 and help you refine your buying decision. Stay tuned and read on!

6 Considerations When Choosing Jawbone UP3 vs. Fitbit Flex 2


Criteria           Fitbit Flex 2Jawbone UP3
Dust-proof and water-resistantYesYes
Built-in clipNoNo
Water-proof depth rating10m10m

First off, when it comes to the design, both Fitbit Flex 2 and Jawbone UP3 is purely fitness band builts. Of course, dust-proofing, sweat-resistance, and water-resistance are the must-have features of a fitness tracker, which both offer to you. They don’t have any screen to inform the data directly on your wrist, which you have to access to your phone to see it. Yet Fitbit Flex 2 can show you the most basic data based on 5 LEDs dot on the band.

Jawbone UP3 is a little bit bigger than Fitbit Flex 2 in width, but in turn, it possesses 5.5g lighter than that of Fitbit Flex 2. The water-proof depth threshold they can withstand is quite mediocre, with just 10m. But in fact, it is more than good enough for the vast majority.


Criteria           Fitbit Flex 2Jawbone UP3
Heart rate monitorNoYes

There is nothing much to say about sensors of a fitness tracker. Fitbit Flex 2 and Jawbone UP3 both offer accelerometer. But the huge flaw occurs in the absence of a built-in heart rate monitor on Fitbit Flex 2, which it definitely misses the chance to provide you plenty of data insights. That deal-breaker point is hard to redeem, which the win is completely given for Jawbone UP3

Activity tracking

Criteria           Fitbit Flex 2Jawbone UP3
Distance trackingYesYes
Walking step taken trackingYesYes
Sleep trackingYesYes
Sleep reportingYesYes
Calories burnt trackingYesYes
Automatic activity detectionNoYes
Activity reportsYesYes
Elevation trackingNoYes
Goal setting modeYesYes
Exercise taggingYesYes
Weight trackingYesYes

Both Jawbone  UP3 and Fitbit Flex 2 offer core fitness tracking modes, including distance tracking, walking step taken tracking, calorie burnt tracking, exercise tagging, and weight tracking. They also keep an eye on your sleep to evaluate the quality, but due to the lack of heart rate monitor, we afraid that Fitbit Flex 2’s data can not be as accurate and thorough as that of Jawbone UP3.

After all, once again, Fitbit shows their inferiority in the competition with the additional elevation tracking is sorely possessed by Jawbone UP3. Moreover, you probably have to go manual to select your exercise in advance, as there is no automatic activity detection on Fitbit Flex 2, which Jawbone UP3 does a pretty good job in this one.


Criteria           Fitbit Flex 2Jawbone UP3
Android compatibleYesYes
iOS compatibleYesYes
Windows compatibleYesYes
Mac OS X compatibleYesYes
Automatically syncsYesYes
Bluetooth version44

Apart from previous sections, things are reassuringly familiar in the connectivity. Fitbit Flex 2 and Jawbone UP3 both acquire the Android and iOS compatibility, and especially with Windows and Mac OS X, for those who want to transfer the data to your laptops. The ability to sync automatically is also provided, and the Bluetooth both Fitbit Flex 2 and Jawbone UP3 support is version 4.


Criteria           Fitbit Flex 2Jawbone UP3
Battery life6 days7 days
Rechargeable batteryYesYes

In terms of the battery, the capacity of Fitbit Flex 2 Jawbone UP3 is not significantly different. Both show quite an exceptional amount of battery longevity, which is six days of Fitbit Flex 2 and seven days of Jawbone UP3.


Criteria           Fitbit Flex 2Jawbone UP3
Predicts start dateYesNo
Silent alarmYesYes
Integrates with social networksYesYes
Inactivity alertsYesYes
Achievement trackingYesYes
Access to online servicesYesYes
Social featuresYesYes
Smart alarmNoYes
Free AD-free AppYesYes
Exercise diaryYesNo
Syncs to the cloudYesYes
External heart rate monitor compatibleYesNo
Predict ovulationYesNo
Period notificationYesNo
Designed for womenYesNo

Regards to the features, both Jawbone UP3 and Fitbit Flex 2 come with Free AD-free apps to sync the data toward, and most features are in the app itself. Fitbit Flex 2 and Jawbone UP 3 offer built-in silent alarm, and inactivity alerts. Other features like stopwatch, social network integration, achievement tracking, online services, and social features are fitted in the apps.

Yet here is where Fitbit Flex 2 makes a huge selling point. Sorely Fitbit Flex 2 can buzz you whenever notifications are present, and the external heart rate monitor compatibility as well. Fitbit also opens up a whole new audience of potential buyers through specifications for women. The data provided to you is even more thoroughly with the exercise diary. The only downward of Fitbit Flex 2 once again comes from the lack of heart rate monitor, as the smart alarm can not function without it, which Jawbone UP3 does possess.

Conclusion: Jawbone UP3 vs. Fitbit Flex 2 – Which One Should You Buy?

At the bottom line, with the fitness performance that you expect from a fitness tracker, we might give a verdict that Jawbone Up3 is more suitable for such purposes. On the other hand, Fitbit Flex 2 has its own specifications to redeem that.

Choosing Jawbone UP3 if:

  • You need thorough data insights as much as possible.
  • You want a light-weight band on your wrist.

Choosing Fitbit Flex 2 if:

  • You need specifications for women.
  • You want to be informed the notifications as soon as possible.