- A great simple one is YR: https://www.yr.no/en
- if you happen to be in Switzerland: https://play.google.com/store/apps/details?id=ch.admin.meteo..., https://apps.apple.com/us/app/meteoswiss/id589772015
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.
Probably some of the best visualization techniques I have seen. Free features cover most use cases; premium gives you better resolution.
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.
The wind and weather map is pretty nice.
Otherwise
Windy.com and Meteoblue are good.
I presume you mean the $7 "For as long as the developer feels like it" Premium Version.