Even though the Flex was briefly superseded
earlier this year with the arrival of the Fitbit Force, it is once again the company's flagship tracker following the
Force's recall earlier this year.
Fitbit
has said it's fixed the issues that plagued the Force and is all set to release
the new, updated version, but until that happens, the Flex is still the
wrist-mounted tracker flagship from the company.
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Buy
Fitbit Flex in Black at Misco for £64.98
Announced
at CES back in 2013, the
Fitbit Flex combines the step-counting technology that made its One and Zip products so useful, and places it on
the wrist for convenience.
This
big design change has some pretty big advantages. For a start, the fear of
having the small sensor pop out from a pocket while walking is gone. With the
wrist mounted option, you always know where the device is.
The
second major benefit is for sleep-tracking. While the Fitbit One offered the
ability to track sleep by slipping the sensor into a soft, velcro arm band, the
Flex leaves the sensor permanently attached, allowing you to switch modes
without removing the device at all.
Unlike the Jawbone Up,
the Flex consists of two separate parts - the sensor and the strap. The sensor
itself is smaller than the One, thanks to the fact that it doesn't include an
LED display.
Instead, five LED lights indicate the
number of steps taken during a day, and are only activated by double tapping
the device.
The rubber wristband is lightweight,
but a little simplistic in its design. Unlike a watch strap or even a bracelet,
the Flex uses a plastic grey latch to poke to plastic prongs into a series of
holes on the band.
Getting the Flex closed the first time
can be challenging, but it does quickly become second nature. It's not as
comfortable or effortless as the Jawbone Up, but it is functional.
The other noteworthy aspect of the Flex
band is the clear bar that sits above the LED lights in the actual tracker
unit. This band allows you to view your progress while wearing the band.
But after a few weeks, that clear band
was already showing signs of wear and tear, with scuffs and scratches, despite
a blatant lack of gruelling conditions.
Of course, Fitbit offers a range of
bands in a variety of colours, which might be a nice way (although expensive)
to work around this problem.
One of the most
immediate joys of using the Fitbit Flex over the Jawbone Up is the inclusion of Bluetooth 4.0 wireless syncing. Instead
of having to manually remove the device and plug it into your phone to sync,
the FitBit will periodically wake up and connect to your phone, keeping your
stats up to date.
The catch is that at the moment,
wireless syncing to mobile still only works with a very limited number of
devices. If you don't own an iPhone 4S,iPhone 5, Galaxy S3, Galaxy S4 or Galaxy Note 2, then you're out of
luck on the phone front.
That said, it also syncs with a 5th Gen
iPod Touch, 3rd and 4th Gen iPad and iPad
mini and the Galaxy Note 10.1
tablet.
While this is currently a major
frustration for Android users, there is good news on that front with Google
announcing Bluetooth Smart support as part of the OS, which should
theoretically give Bluetooth 4.0 syncing support to a much wider range of
devices.
In the meantime, the Flex does come
with a small USB dongle for syncing to Mac or PC. It works well, but is nowhere
near as elegant a solution as the mobile syncing.
One thing that does work in the Flex's
favour is battery life. Despite the inclusion of Bluetooth for wireless
syncing, the Flex still managed to almost match the Jawbone Up for longevity
when worn side by side.
While the Up can be pushed to 9 days of
use - depending on how active you are - the Flex tended to last seven or eight
days.
Sure, that's a step down, but the
convenience of wireless syncing makes it all worthwhile. Especially given it
also offers some kind of real time indication of your daily progress in the
form of five LED lights, while the Up has nothing.
The question of accuracy
Like a high-tech
hipster, we tested the Flex by wearing it on our weaker arm, with the Jawbone Up right alongside it. Despite the proximity
of the two devices, the results were quite varied.
On the sleep front, the Jawbone was
easily the stronger device. Nights spent getting up and down to unsettled
children were accurately broken up by the Up as times awake, while the Fitbit
app claimed that sleep was just a little unsettled.
But when it came to step counting, the
devices offered such varied results that you had to wonder how they could both
claim to count the same thing.
Without fail, the Flex reported a
significantly higher number of steps taken than the Up. On a day where we
conquered our 10,000 step goal on the Flex, the Up would bring us back to earth
by reporting only 8,000 steps taken.
To test which of the two was more
accurate, we physically walked 200 steps, counting as we went. Neither device
tracked the steps 100 per cent accurately, although the Flex did come up
slightly closer to the mark.
How that extrapolates to larger numbers
is unclear, but there's a real question mark over the accuracy of the
wrist-mounted device, which is something we didn't encounter with the
pocket-mounted One or Flex.
Steps to 'appiness
Fitbit's app is easy
enough to come to grips with for even the most novice of users, but does let
you drill down into more and more layers of information.
That said, it still struggles with food
tracking thanks to a lack of internationally localised cuisines, although that
is something that can be worked around thanks to the third party app ecosystem
and services like MyFitnessPal.
Compared to the Jawbone, the social
aspect with the FitBit app seems undercooked, which seems like a missed
opportunity.
On the upside, Fitbit has just launched
IFTTT compatibility, which will automate many functions and help improve the
overall function of the device with very little effort.
Which goes back to the verdict we came
to in our Jawbone Up review, that the Fitbit is a much more useful fitness
tool, while the Up is a lifestyle tech accessory.
The Flex does start to veer to the
accessory side of the fence with its design, but it's app keeps it firmly in
the fitness tool category.
Verdict
The Fitbit ecosystem
is a great way to start using technology to keep on top of your personal
health. But the Flex is the weakest link in the product lineup, a device that
tries to take the same technology as the One and place it in a much more
convenient position on the body.
The catch is that it sacrifices too
much. Gone is the satisfying feeling of accuracy, with high step counts
seemingly too-easy to obtain thanks to inaccurate algorithms.
The wristband itself could also use a
little more work. It's lightweight and comfortable, but looks more like the
watchband on a kid's watch than a truly stylish piece of tech.
All that said though, Fitbit has shown
the strengths of its platform. Wireless syncing is essential in this product
lineup, and having a strong app ecosystem is a huge benefit to fitness trackers
out there.
There's no doubt the second generation Flex will improve on all of the
issues, but at this stage the One is still a much better alternative for your
money.