I'm in the market for a fitness tracker.

My usual fitness activities (stationary elliptical trainer, hiking, biking) are temporarily restricted, so I've been swimming a great deal. Using a phone isn't giving me adequate exertion tracking data for walking (stride counts and heart rate not available/accurate), and it's especially not useful for aquatics.

I'd be grateful if anyone can recommend something they have experience with.

My constraints are as follows:

I'd rather not contribute to e-waste with yet another gadget du jour - service life should be at least the recharge cycle life of the battery.

No Apple or Samsung devices. I'm not in those ecosystems, and don't plan to be because reasons.

Should be at least IPX5, preferably IPX7 waterproof.

Helps if it's not butt-ugly, but I'll take what I can get - replaceable bands are a plus.

Able to fit women - I don't have issues with a larger face so much as a band that's too large to fit comfortably or provide secure contact for accurate heart rate monitoring.

GPS and sleep tracking would be nice, but not mandatory if the device ecosystem isn't reasonably private.

Non-proprietary rechargers preferred.

A couple of Fitbit models seem be well-reviewed, but actual user ratings are equivocal, and quality is erratic.

Looking forward to any contributions!

After watching this and this, and dealing with the cringe and shock, I wondered about whether these things, including this but also stuff like sex robots or other robots whose purpose is some sort of affection, will ever take off. I know the phenomenon where in Japan adult males date handheld gameboy-like computers (wut?), but apart from that, I'm not sure anybody will prefer these stuff instead of the real thing. It also feels deeply weird, bizarre and cringy. What do you think of these tech?