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

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I bought a Sense a few years but the screen cracked so I bought Versa (2maybe?) and the battery completely broke and now I'm back to my original Sense! Cracked but still works well! I've been wanting a new fitness tracker, and while I have been using Fitbit for many years, I've been so disappointed but I just don't know what else I would be happy with.
Charge 6 might still be on sale for 100. Never really used the Smartphone functions on my versa, liking the charge so far Charge does have healthconnect, which is a standard for apps and other devices to share health stuff. I don't know if that works with apple.
Damn. I had no idea they that bad. I used a Fitbit verse for years and it would last like a week even with rides and such.
My seventh Fitbit died last week (from Luxe to Versa to Charge 5 and 6, this was my second in-warranty replacement), white line on the screen to no screen at all within 24 hours. So with some Target credit I decided to go with a Garmin Instinct for $200. The GPS is much, much more accurate (even when not paired with my phone), the app tracks a lot more information than the Fitbit app did and takes up a third of the space on my phone. I miss the constant step updates; the Garmin just updates every minute. That's about the only drawback.
The Versas do all that and more and the battery life is 5-7 days.
The best smartwatch for women that looks good and works well is usually one that prioritises a slimmer case, comfort, and simple everyday features over hardcore fitness metrics. For style and daily use, Apple Watch SE stands out if paired with an iPhone. The smaller case sizes sit well on slimmer wrists, notifications are smooth, step and sleep tracking are accurate, and it feels more like a watch than a gadget once a softer strap is added. Fitbit Versa is a strong alternative for a less techy feel, with excellent battery life, lightweight design, and very easy-to-read health stats without constant prompts. Comfort, strap choice, and screen size matter more than raw specs here. A smaller case with a fabric or leather-style strap makes a big difference for all-day wear and avoids the bulky fitness watch look.
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