There's no "decent" Weather apps - that's obviously subjective, but WeatherPro for iOS and Android I really liked.
I still miss iOS's weather app really, the built-in one on the HTC One (don't know if it's Android's default) is a bit crap - made worse by the fact that different screens of the Android interface seem to think they're in different geographic locations.
Also there's no port of certain apps I rely on a lot like CityMapper, and the best guitar tuner app I've found on iOS or Android: Cleartune.
Have a look at this link[1], you can find reviews for ton of weather apps. Every week a new weather app is released on WP, i am sure you find the one you like.
Also there's no port of certain apps I rely on a lot like CityMapper, and the best guitar tuner app I've found on iOS or Android: Cleartune.