Government sponsored apps are great because there's no advertising, they aren't selling your data, and they are free. They usually pay to collect the data, run the models, and provide the API anyway. Providing the app is the cheap part.
I like Weawow. It's proven accurate regarding weather trends, but it tends to be overly dramatic. I'm guessing this is related to living in a valley, as the weather to the north and south seems to match their forecast better.
It has the data that's indispensable to me: precipitation amount per hour. I don't care as much about how likely it is to rain, I care about whether I'm going to get sprinkled on or drenched.
I use Weawow, too, but it's UI is very cumbersome in terms of getting quickly to what you care about. I have Meteograms' widget on my homescreen to get precip/hr and the core metrics similar to the wunderground 10 day view, but I find it much easier to read a daily forecast presented in a more traditional manner so go from Meteogram (tactical) to Weawow (strategic) forecasts.
I've been using Today Weather on Android ever since Dark Sky was killed off there. It looks nice, lots of different data sources, and the $7 lifetime
Premium Version is a good price.
fwiw, I paid for a lifetime sub to eHD Weather (by Elecont) ... back in 2013 and still use it. Moreover, the dev still responds to emails within a couple hours. If I can get 10 years of use out of an app for $5, that's excellent value!