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

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I tried the xiaomi after band 8, its so inaccurate, thinks I'm working out just standing still, just ordered the band 10
Xiaomi Smart watches. I have a mi band 8. Love it. There's lots of different options within your budget
I'm using a xiaomi smart band 8. Galing kasi ako sa xiaomi. Goods sya nung naka connect pa sya sa xiaomi ko pero nung cinonnect ko na sa iPhone ko parang unreaponsive, ang hirap i-connect minsan, and biglang nag stop mag track mid run.
Coros seems to be the overall pick for best balance between low price and good features. If you're willing to go super basic, the Garmin Forerunner 55 is usually on sale somewhere for way less than its MSRP. You can also get off-brand fitness trackers (usually Chinese brands with a proprietary app that may or may not sync with other training apps) for dirt cheap on Amazon. Amazfit and Xaiomi have fitness bands for less than €50. I used the Mi Smart Band 8 for a while and it was fine. Not great, but it did okay and for the price, it was great.
I have Mi Band 8 and Samsung Ultra Replica attached to P7A
I wear a fitness band on one hand and a normal watch on the other. Xiaomi band 8, it's actually amazing. 2 week battery life, tracks notifications and all the basic stuff id even want a smart watch to do for me, and it's small enough that it just looks like a regular bracelet when I put the screen in the palm side of my wrist.
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

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Apple - Ultra Series

Ranked #1
Garmin - Fenix 7 Series

Ranked #1
Garmin - Fenix 7 Series

Ranked #1
Garmin - Forerunner 255 Series

Ranked #1
Oura - Oura Ring Series