Hi everyone welcome to Wesknows tech news and reviews! if you are an Amazfit fan,
this video is for you! today we're doing the ultimate amazfit heart rate accuracy challenge
in today's test we have the amazfit band 5, bip u, gts and gts 2 mini. baseline will be the
heart rate measured by polar h-10 chest strap! we'll go through the plots and charts of each
and at the end of the video we'll rank the four trackers based on the factual metrics recorded
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yesterday i took the four trackers out on an evening run as you can see from the tracing in
the polar beat app. i ran 7.4 kilometers in just one hour, the average heart rate was measured at
158 beats per minute and the max was 183 beats per minute the trackers were strapped up tightly on my
wrists i started the run on all four devices simultaneously and took off i have overlaid
the heart rate plots of every smartwatch over the polar h10 hrm chart let's go through each
one with a short recap of what the tracker offers and then its test results by the end of the video
we'll rank the results to find the most accurate optical heart rate sensor of the tested watches
feel free to skip through to the session you want with the timestamps i've left in the description
first up is the amasfitband5 this is the traditional fitness tracker costing just
30 bucks essentially it's a newer and improved xiaomi mi band 5. it has a slightly wider case
still plasticky same tpu strap from which you can pop out the tracker face there's a
1.1 inch amoled display it's waterproof up to 50 meters there are 11 sport modes and you also get
two auto-recognized activities walking and running you get an arrow of apps and monitors that track
your pie blood oxygen saturation stress level there's a timed breathing app and the cherry on
top is that it does get alexa to tell you a joke share directions or tell you the weather forecast
and we can see that the watch measured an average heart rate of 157 beats per minute and a max of
177. the average heart rate variance is under one percent at just point six percent while the max is
off by three point three percent from the charts we can see why the max is significantly lower than
the chest strap the only spike was literally cut off in regards to the rest of the chart it's scary
how such a cheap tracker manages such accurate readings over a one hour run or 3 600 data points
one every second now let's take a look at amazfit bip u so this one costs about 50 bucks the design
brings us closer to a smartwatch rather than the traditional tracker the display is a 1.43 inch
color tft lcd display there is a 20 millimeter replaceable silicon strap there are 60 sport
modes to choose from and all exercises are now goal-based there's no input gps here just connect
the gps via bluetooth connection with your phone the band is water resistant though so you can take
it swimming you get an array of apps and monitors that track your plyometric blood oxygen saturation
stress level there's a timed breathing app and the cherry on top is the female cycle tractor there
are also some advanced apps that were brought in from the more premium smartwatches such as the
pomodoro tracker and the world clock the watch did run out of battery 42 minutes into the run so we
only have about two thirds of the plot here during that period the bip u measured an average heart
rate of 155 beats per minute and a max of 183 so the average heart rate variance is 1.9 percent
while the max is spot on the tracing of the heart rate peaks is very accurate but the throws are
slightly overestimated and hence the heart rate average is pulled lower than the polar ecg strap
now let's take a look at the m mass for gts and it costs approximately 120 bucks but you can get
it on special or in discount for as low as 100. basically you get a 1.65 inch amoled display with
a resolution of 341 ppi you also get 20 millimeter replaceable straps there are 12 preset sport modes
that are goal based additionally it has inbuilt dual gps and the gts can actually push out 25
hours of gps recorded activities from a single charge there are also an air pressure sensor a
compass and an altimeter and of course you also get the pi metric the watch measures an average
heart rate of 156 beats per minute and a max of 182. the average heart rate variance is
1.3 percent while the max is off by just half a percent from the charts we can see only one
distinct reading that is not in line with the ecg chest strap the peaks and throws are pretty much
in sync with the chest strap for the full 1 hour and lastly we have the gts2 mini which costs just
under 100 bucks or 80 pounds in the uk it's almost square with dimensions of 40.5 by 35.8 millimeters
it's very slim and sits just nine millimeters on top of your wrist it has an aluminium alloy
frame around the bezel highlighting the premium as opposed to the bpu the amoled display is 1.55
inches and has a ppi resolution you get 70 gold based port profiles smart alerts and inbuilt gps
you also get a vast amount of apps and monitors that track your pi blood oxygen saturation stress
level there's a timed breathing app there's a female cycle tracker there's a pomodoro tracker
and world clock apps too the cherry on top is that in the near future alexa is coming by an
ota update the watch measures an average heart rate of 154 beats per minute and a max of 184
the average heart rate variance is two and a half percent while the max is just over by 0.5 percent
the tracing in general is good recording of the peaks and the trolls but we see a number of points
on the plot where the trolls are recorded lower than by the chest strap and that is the reason for
the lower average result let's discuss the results rank them and potentially make some conclusions
if you have watched our prior tests with other tracker manufacturers you will appreciate that
the amazfit heart rate sensors are up there with the best in class even with these four watches
the optical heart rate sensors on the budget trackers and budget smart watches are tracing your
heart rate almost in sync with the professional grade ecg chest strap from polar personally i'm
very impressed considering the bpu only lasts at two thirds of the full run we'll have to default
it to fourth place third place goes to amazfit band 5. the average heart rate is just 0.6 percent
out of sync but the 183 beats per minute spike was not registered and gave us a 3.3 percent variance
the runner-up is gts2 mini it does a solid job of following the peaks and the trolls the only issue
i found is that in the first half of the route we can see some underestimation of the peaks
and that's the cause of the lower average and the first place actually goes to a mass for gts
there's only one obvious reading that's out of sync with the chest strap otherwise the optical
heart rate sensor is almost in line with the ecg hrm thank you all for watching let me know your
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