Amazfit T-Rex 3

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Overall

#43 in

Fitness Trackers

according to Reddit Icon Reddit

Sentiment score82% positive
46
2
8

Top Pros

Top Cons

Last updated: Apr 17, 2026

Reddit Reviews

Reddit IconAevernum
5 months ago

The sensors suit me. It detects sleep well. It gives advice on recovery. The watch worked in auto mode for about 10 days, 57% remained. I can't compare it with the Pro version, I haven't used the Pro version.

Reddit IconApprehensivePizza964
4 months ago

The watch so many people have no idea exists, is the Amazfit T-Rex 2 or 3. I prefer the 2 as the size is perfect but the 3 is larger. These watches can do it all and have a battery life on a single charge of 27-30 days. Yes, it tracks your health, phone calls and messages etc. You name it, it can do it. I was dead set on Garmins top watch and stumbled on the Trex at Best buy by accident. Saw it was a couple hundred bucks and can't find anything like it for the price. Link, https://us.amazfit.com/products/amazfit-t-rex-3?srsltid=AfmBOop_QFFZAqxYEbadiSkjE18Be4yPUUNQ1yQYy1i70QuodQiDMxmI

Reddit Iconavirup_231
7 months ago

"Honestly there are SO many expensive options out there that do NOTHING, go for mid tier options like these 2 since stuff like this strikes a balance between price and features. 1) [The Amazfit one](https://quancoconline.com/dp-B0DHZDCF6WI) this one’s my top pick if you want REALLY GOOD battery life (27+ days), reliable fitness tracking, proper waterproofing, offline maps, and even AI voice control. Like, it does everything you actually need without turning into a second phone but it does not have google play store or third-party apps so if you’re into installing spotify or messaging apps on your watch, this ain’t it. 2) Galaxy watch6 is sleek, very smooth if you’re on a samsung phone, and probably the best looking out of the bunch. The fitness tracking’s good, and notifications are seamless but battery life isn’t great usually around 1–1.5 days tops, so you’ll need to charge it almost daily."

Reddit IconBeYeCursed100Fold
11 months ago

I love Amazfit. I have the T-Rex and T-Rex 3, the 3 gets about 14-18 days of battery even with GPS on.

11 months ago

I love Amazfit. I have the T-Rex and T-Rex 3, the 3 gets about 14-18 days of battery even with GPS on.

Reddit IconBlastTyrantKM
3 months ago

Just about any fitness watch will do a decent job of that. I just got an Amazfit T-Rex 3 and it's really nice. Very good battery life, all the body metrics you can imagine, very accurate GPS, and just about all the smartwatch features you could hope for. It just doesn't have the seamless integration that an Apple watch has with iPhone or a Galaxy Watch has with Samsung.

5 months ago

Personally, I found maps on a watch mostly useless. I've had a Garmin Fenix 5x and I currently have an Amazfit T-Rex 3. The screen is too small to see any real details. I had to constantly zoom in to see any details that were near, then zoom back out so I could see just a little bit further ahead. Eventually, I fully gave up with the watch maps. It's MUCH easier to just use your phone for map navigation. Plus here's something to consider...if you have a fast charging power bank, a phone will charge *MUCH* faster than a watch. Not to mention, this time of year your watch is probably covered by at least one sleeve and maybe the cuff of a glove, too. Which makes it much more cumbersome to use for anything, let alone navigation Edit: I'm not saying you can't navigate with it. You can. But it's not "just glance at my watch to see where I'm going". It's not that. You have to stop and fiddle with it, and fiddle with it, and fiddle with it

Reddit IconChasingPotatoes17
9 months ago

How small? Mine is 5.9” and I wear a T-Rex 3 and Balance 2. Yes they are large on my wrist but I love a chunky watch. Of the two, Balance 2 is definitely better for less movement on wrist during a workout (which translates to more reliable HRM data).

9 months ago

I tend to wear my watches about 3 finger width behind my wrist bone. With the TRex 3’s default strap on the tightest hole that’s mostly okay but I do use an external HRM during workouts. If I swap in a different strap (similar in style to the Apple sport band with all the holes in it) I can get the device pretty securely in place and have no issues. With the Balance 2 (using the red strap, I haven’t tried the black one) I have zero issues. If either watch were *any* bigger it would be a problem though. They do look massive on my arm, but I like that style. If you’re not sure, the slightly smaller Active 2 might be a safer bet. Feature and sensor wise it’s almost the same. It doesn’t have multi-band GPS, but neither does my Apple Watch 10 and it doesn’t great with GPS accuracy. Sometimes the specs aren’t the whole story.

Reddit Icondesko1973
2 months ago

I switched from Venu 2 to Amazfit Rex3 and I don't regret it

Reddit Iconearmuffeggplant
7 months ago

The Amazfit T Rex 3 is a steal for the price and features. They also just released a Pro model which has on board mapping and other features typically reserved for expensive garmin models. Battery life is amazing and GPS accuracy has been great for me in Colorado.

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