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
Throwing it out there, but https://www.nhc.noaa.gov is hands down the best hurricane tracking site. It’s low Bandwidth, quick, lightweight, legit data backed, and generally the source data for most other weather sites.
noaa do be fuckin