Amazfit T-Rex Pro: Heart Rate Test!

Twitter: @QuantifiedRob

👇Affiliate* (paid) link to join WHOOP, support the channel!👇

👇Amazon Affiliate* (paid) links. Supports the channel, doesn't cost you any more!👇

*My opinions are completely my own. However, I do earn a small commission if you purchase any of these devices via my affiliate links.

📸My Gear* (paid link)📸

📹Fitbit Videos📹

📹Apple watch videos📹

📹First Garmin Venu Sq Video📹

📹Oura Ring videos📹

📹Withings Scanwatch videos📹

⏱️This comparison is part of a larger project where I spend over 11 hours a week tracking everything in my life. If you'd like to know more:

Timestamps:
00:00 Intro
01:05 General Background
01:55 Results: Test Background
02:23 Results: Spinning Test
04:26 Results: Cycling Test
05:53 Results: Weight Lifting Test
07:16 Results: Compared To Other Watches
10:40 Conclusions
11:54 Buy The T-Rex Pro?
09:16 Limitations

🎵Music🎵
(2) Wonders by JVNA
(3) Can’t Sleep (YouTube Audio Library)
(4) Classique (YouTube Audio Library)
(5) Blurry Vision (YouTube Audio Library)
Person Waking up Video by Ba Tik from Pexels

[LukeRM]

You're pretty much the only youtuber that actually puts some effort and tests these watches without just blindly recommending based on specs and features like so many others do. I'm so sick of people praising this watch just because it's good deal for the buck but nobody does any actual reliable on-field testing.

If they do any testing at all (which is rare on itself) it's in very controlled indoor environment which doesn't give any reliable results.

You are the golden standard of how the reviews should be made. Thanks.

[WalterFrancis]

I look forward to seeing your results on the upcoming T Rex 2 Pro, I really hope they fix the issues you keep finding over and over in Amazfit.

[mauricioernestodesouza]

Hello Rob.

Congratulations on your analyses. They helped me a lot and understood some things. I have an Amazfit T-rex with GPS interference and REM sleep recording issues.

By watching your videos I learned a few things and added to what I already knew about the Zepp App by Amazfit. Zepp has in its configurations the "Record of Behavior". There is the possibility of registering several types of behaviors.

I started to record (with the help of the cell phone) the behavior of "Acquisition of "NMEA" and "Sleep". In both I got better performance from the sensors as I accumulated data from Sleep and NMEA behavior. To improve my sleep data records, wear the watch longer during the day. In the "Health Monitoring", more specifically in the "Detection Method", I left it checked for "Automatic detection of heart rate 3 Sleep Assistant".

I will continue to make these monitoring records with Zepp to have more basis to know that there is improvement in the system to "learn" about the data captured by the sensors.

Rob, sorry for the large text and I hope this information helps you with reviews of upcoming Amazfit gear.

[kick]

Thank you for the detail on the heart rate! This is the best review on the T-Rex Pro I have found!

[QUADBOYification]

We are in 2023 now, did you do a follow-up after firmware updates?

[LIFADxRammstein]

I saw all your videos about the Amazfit watches and I totally agree with you. I have a GTS 2e and wanted to use it for my Hometrainer. It struggles every time to pick up my heart rate, it's always too low and won't get higher. I asked the Amazfit support about that and after a few conversations they released a small update. After installing it and testing it again nothing changed. I told them again and they said it won't work because there is not enough movement on your wirst. Well, good. Having a tons of sports modes but nothing works great. I was so disappointed but missed the time where I could've sent it back.

[GiuseppeSavo]

Hi, I have a t-rex pro and I've been using it since last august.
What I noticed is that:
1. it's necessary some attention in the position on the arm. I have different data on left or right arm. This is due probably to the size of t-rex.
2. it's necessary to wear it tight.
3. there is a "little" (3-5 s) delay between the heart rate monitor (I have a bryton connected to my cyclo computer) and the trex pro

In my experience it's not that bad, actually it seems to record what's happening (but on late), so your results look very different from what I've noticed until now...

[vincepeacham]

Great video and channel I've just discovered. Been having issues with the HR measurement on my T Rex pro; up in the 200s when out walking and in the low 50s when doing cardio, but issues are very intermittent. Tried a factory reset, which may have helped but the fault is intermittent so will wait and see; perusing other forums it doesn't appear to be isolated, and your video has sort of confirmed it. Think I'm gonna go for a Garm8n Venu 2, your test on it is quite complimentary, thanks.

[real-manoj-manoharan]

You are seriously awesome, I made my purchasing decision based on your data. Thanks for all your hard work.

[pedroguilhon]

Honestly, I feel like we that are android users have no option for accurate heart rate on weight lifting. I have no idea anymore what smartwatch Im suppose to buy to have good measurements on my weight lifting sessions.

[christoskolytoumpas]

Could you test t-rex 2? It has the next gen biotracker, supposed to be more accurate than his father (trex pro).

[yeni]

Perfect Job again, this is a Rob Classic 💯

[simdencard]

Thanks for your review on the T Rex Pro. I have one and was in two minds about whether the heart rate tracking was any good. Now I know and will not use it anymore. I have the new Huawei GT3, which Huawei claims is 96% accurate when compared to a chest strap and has better heart rate tracking than the highly rated Apple Watch. Could you check this watch out please?

[Shoeless_DA]

Exact reason I returned my Amazfit T-Rex. Great vid!

[thedesertexplorer]

Hi Rob, would like to know if you did the following in your tests: 1) Tighten the watch on your wrist. 2) Did you try it on both wrists? 3) have tried it on other people's wrist?

[khairur]

Can you please do your scientific test on the newest iteration of this watch, the trex pro 2. Thank you. May you always be well and prosper!

[taniuta]

Would be awesome if you'd review the Coros line, like the Coros Pace 2. 👌🏼 Thanks for all the work you put into these videos!!

[minantraXOX]

Hiya, please can you do a review of the Amazfit T-Rex-2, thanks in advance.

[markovskify]

Yes, heart rate sensors on amazfit watches are so inaccurate, that is hard to believe

[tdd]

Great video. Fortunately, HR tracking a rough "ballpark" is good enough for me. I have the T-Rex 2 and love it. Though, I really miss my Pebble which died a few months ago. The Pebble of 5 years ago was more advanced than most modern smart watches of today.