The app is Clime Pro on iOS, they lock full access to Hurricane Milton data behind a $10 USD per week paywall.
If you’re in the area impacted by Milton, you can find publicly available resources at the National Hurricane Center’s website: National Hurricane Center
There is nothing more tech-bro libertarian than taking free public data, wrapping it in a slick package, and selling it.
I used to think that TV weather people were obsolete, but now I’m nostalgic for the public service that survived in the old capitalistic ad based broadcast TV era.