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

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I had a 1st gen solar, for like 1-2 days, the only thing I recall was that it took some time to get gps fix, even if updated, synced with garmin connect. Other than that it recorded stuff. Although I love the yellow one, would buy it as main watch today, but everyone has different exigences
While I agree having come from a Garmin instinct solar with incredible battery life. The pixel watch 4 needs to be charged every ~2 days and has fast charging. So take it off, pop it on the charger, have a shower and it's back to 100%. It's seriously impressive.
Not sure if it'll fit all your needs but I got a Garmin Instinct Solar as I also didn't care about having a "smart" watch with a bunch of apps and features I wouldn't use. I personally love it. It was on the cheaper side since it doesn't have a touch screen and all the features the higher end watches have. I believe it can control your music, at least skip songs, but im not 100% on that because I don't use that feature personally.
Oh yeah and you can connect to the free Garmin Connect app which will log all the data from your watch. It also has some free training plans.
I still wear my Instinct Solar daily. If you are replacing Apple watch you may be disappointed. I wouldn't call it a smartwatch necessarily, more a sports watch. I specifically got it because I didn't want a smart watch I just wanted something to record workouts and health data as well as the breadcrumb feature it has in case I ever got lost backpacking. It's a great watch, I love it. After multiple years the battery life is still great. If I'm not recording activities with it, I have around 25 days charge time on average. Has been very durable for me I wear it everywhere doing everything and no issues. I got one small scratch on the screen a few years back and thats about it.
Same. I still rock an original instinct solar. Love having all the basic stuff and the solar is super helpful. If I needed maps I have a forerunner 955 as well.
Agreed. I have the Instinct (solar). It has a simple screen and it’s rugged. I think it has all the tech you need. I use it for MTB and backpacking.
We have the Garmin Index S2 scales. I wear a Garmin Venu Sq and my husband has a Garmin Instinct Solar. TBH we would not buy anything else!
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.

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Oura - Oura Ring Series

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Apple - Ultra Series

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Garmin - Enduro 3

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Garmin - Fenix 7 Series

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Garmin - Forerunner 255 Series

Ranked #1
Oura - Oura Ring Series