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
AccuWeather is a terrible company owned by human scum trying to exclusively privatize taxpayer-funded weather data.
If you care about having your taxpayer-funded weather accessible without going through a private, corporate middleman, you should never use AccuWeather.