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
Free coverage from Ryan Hall Y’all on youtube. He’s livestreaming for the foreseeable future with no ads.
LightningMaps is my favorite real time weather map site.
NOAA’s National Hurricane Center is the gold standard and updates regularly.
I came in here to link Ryan Hall. He and the ring of meteorologists, storm chasers, weather enthusiasts do fantastic work.