Can I have recommendations on open source weather apps that use publicly available weather info for Android?

I've been using Weatherbug as my "gold standard" for years as an athletic trainer to track incoming storms and lightning strike data during outdoor sports events, so those features are pretty important to me. I've just gotten so fed up with their shitty practices. The ads are getting worse and worse(to the point that they're almost exclusively clickbait malware) and they keep nudging me with push notifications to buy the ad free version. Which is of course a subscription instead of a one time payment. They even tested locking the future radar behind a paywall briefly. They must have gotten hammered by uninstalls because it didn't last very long, but I'm not comfortable with staying engaged with a company that's constantly trying to see what features they can get away with removing.

Thanks!