Now Weather - just released, visual weather app for iPhone (kickstandapps.com)

I just use http://forecast.io saved to my home screen.

I second this. There are plenty of free, accurate and beautiful weather apps available. I was kind of hoping there would be a page which shows what _unique_ features this app provides which would be worth paying for. The features listed are available in most mainstream weather apps.

Same thing on iOS, really. The weather in notification center meets most of my needs, and when it doesn't, I click through to the Apple weather app.

The only third-party weather app I use now is Dark Sky, which answers a different question: when will it stop raining?