Best Health / HR / Sleep tracking apps?

Hi everyone, new to apple watches, just got my first in the way of a Series 8 and Im loving it.

I have purchased apps "HeartWatch" and "AutoSleep" for in depth HR and sleep tracking. I really like the way you can see such great details with these apps, but the GUI and UX are really quite bad.

Id love some ideas! Dont mind if theyre paid as long as theyre not subscription.