Dark Sky definitely got it right with an incredibly efficient and informative display. Almost all of that data has now made it into Apple's Weather app, but with much more concern for making it pretty than making it efficient.

I started using Dark Sky in 2008 when it was nothing but the forecast.io website. There was no app yet and it had not been renamed to Dark Sky yet. I started transitioning to Weather after Apple announced the death of the app. I used both of them for a while, but have now been 100% Weather app for a few months.

I use https://maps.darksky.net quite often. I'll miss that when it's gone, or maybe they will leave it up and rename it?