Best run and sleep track app to make the watch a bit more sporty?

Well, I still don't own the watch but I have been inquiring a lot, up to the point that I had the opportunity of using it couple days. I don't know if this is one of those things you fall in love with time, but I am sure it was not instantly and couple days were not enough.

I know the differences between wearables focused more on the sport side, like the fitbit, garmin, etc and Apple Watch, which is obviously much more "smart" and integrated to the apple ecosystem. But having that said I would imagine that third party apps should have close a bit that gap. On the running department I had the nike app, which is great for a basic runner (which probably describe me) but still lacking more advanced features to personalize a bit more your training like intervals, coaching, etc. (compared to what GARMIN offers).

On the other hand, although there are a lot of sleep track apps, nobody seemed to fully deliver. Which one are you using?

It could have been that I just used free apps during my small Apple Watch S4 journey, but do you have good free/paid options for the above requests?

I also noted that best apps are Apple apps in general, although I didn't tried a lot.

Don't get me wrong, the notifications, music controls, camera control and connectivity in general to be fair exceeds the competition by far. But without the sport department a little bit more refined, I felt it somehow incomplete...

Thanks!