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
Weather.gov had the front page downgraded during the Trump administration.
However, if you take a second and put in your ZIP Code and poke around some, it is really freaking good.
And it’s free.