Weather agencies funded by taxes should make their data available to everyone, since it’s the public that finances them. Luckily, that’s already the case where I live, but when I travel I have to rely on global sources like Open-Meteo, which are usually less accurate than local ones. Another open (and global) alternative would be great.
If a weather app is going to be truly useful, it usually needs a lot of permissions, like access to your location all the time, notifications, etc., and I don’t feel comfortable giving a proprietary app that kind of access, especially when there are great FOSS alternatives.