Garmin
Forerunner 255 Series
Long battery; but wrist HR tracking is inconsistent.

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Amazfit trex. I have the trex pro, but the newer 3 and ultra are pretty cool. I think they are all less than 300
I agree I too have an amazfit T-Rex ultra , very good for tracking the trail with GPS system, and good battery, rugged for outdoor activities. This is very good for budget constraints. But if heart rate monitoring is a must then I will not recommend this as it's correct only 60% .
the t rex 3 pro seems good and it has calling functions the torch light seems super useful as well, i am so tempted to upgrade from my already excellent t rex ultra
there's the flashlight that's useful in a pinch, i think it has a mic so u can speak into it, then there's also the titanium used over steel and the sapphire glass thats more hardy i am not too sure on the routes yet but yes i think thats the advantage over it too i am currently using the t rex ultra which is still a champ, but fingers are feeling itchy to get the 3 pro
amazfit T rex ultra Orient Kamasu 2 love these 2 to bits in their respective areas!
Nothing compares to the AWU on an iPhone. You won't find anything close to it, sorry. Not Garmin, not Amazfit, not Coros...If you are happy with the AWU I would just save up for the AWU3 and continue being happy. Now to answer your questions as far as I know, there aren't any native apps on the Amazfit ecosystem as of now (YT Music and of course Apple Music) and the controlling the music from your watch that's playing on your phone can be done but on a basic level. You can reply to messages now but you have to use a mirroring app to do this and well let's just say that you having to share your info with a fourth app to get access to to a third one just sounds complicated and not safe. If you are looking for something like a Smartwatch, get am AWU. If you are looking to put more and more into your fitness and lose on a bunch of smart features but still get a decent watch, then the T-Rex 3 Pro might be worth a shot.
Don't rule out Amazfit. I've been running a trex for 3 years now. They compare favorably to Garmin.
“‘Best’ is kind of impossible without knowing your budget and what you care about most, but here’s the short version for 2025: * **If you mainly want fitness + crazy battery** → look at **Garmin** (Forerunner / Venu / Fénix / Epix depending on your budget and if you want AMOLED or not). Great GPS, stats, and works well with both Android & iOS, but smart features are more basic. * **If you want a “do everything” smartwatch and you’re OK with daily charging** → * On **iOS**: Apple Watch (if your iPhone is recent enough, that’s still the most seamless option). * On **Android**: **Galaxy Watch** or **Pixel Watch** families for the best apps + integration. * **If you want something cheaper but solid for fitness** → Amazfit (T-Rex, Cheetah, etc.) gives good GPS + long battery for the price, with decent app support. Since you have both Android and iOS, I’d start by asking: * Do you care more about **fitness metrics + battery** or **apps + smart features**? * Max budget? Answer that and people here can give you 2–3 very precise models instead of generic “get an Apple Watch” replies.”
Garmin
Forerunner 255 Series
Long battery; but wrist HR tracking is inconsistent.

Garmin
Forerunner 955 Series
Best value, clear MIP screen; limited smartwatch features.

Garmin
Fenix 7 Series
Durable, multi-week battery, flashlight; high price, buggy software.
Garmin
Instinct 2 Series
Rugged, solar multi-week battery; bulky, small screen readability issues.

Garmin
Enduro 3
Multi-week solar battery, lightweight; but bulky form factor.

Ranked #1
Oura - Oura Ring Series

Ranked #1
Apple - Ultra Series

Ranked #1
Garmin - Enduro 3

Ranked #1
Garmin - Fenix 7 Series

Ranked #1
Garmin - Forerunner 255 Series

Ranked #1
Oura - Oura Ring Series