I have been using a Pebble Time Steel for years even after their acquisition by Garmin Someone corrected me it was FitBit not Garmin thanks to Rebble, a modded firmware that gives it new life, but I would like a smartwatch that can track my heart rate.
I don’t mind using an older device especially if it means a cheaper price. A bonus for me would be if it still had some kind of community around it or a custom firmware like Pebble watches do.
I found an original Moto 360 with a functional battery for about $30 but I am not sure if due its age its functionality would be greatly limited.
Edit: It seems like Garmin and FitBit might be worth looking at. But I wouldn’t know what devices to look at or if there have been any major improvements with recent revisions.
The Fitbit Versa series give me the vibe that this is where pebble could have headed if they hadn’t gone under. Since Fitbit bought the Pebble estate I guess that’s plausible. If you care more about health than fitness I would look into the Fitbit “Sense” series. They have most of the fitness options from Versa but also ECG and stress tracking.
No 3rd party apps, but they’re pretty good on battery life (My partner’s Versa 3 will last 11 days on a charge).