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
I only ever check my weather on NWS, but a year or two ago they went from having easily read hourly forecast data to those obnoxious graphs. I have zero clue why they did that.