Actually, there are several. These smartphone apps can be very useful in preparing for, and surviving a hurricane, or other natural disaster.

StopDisaster includes preparedness checklists for hurricanes, earthquakes,  and other disasters. ($1.99)

 

Dropbox enables you to upload files to your folder. If you lose your phone or can't get to your computer, they are instantly available on all your other computers. (Free)

MotionX GPS Drive is the cheapest and most popular way to guide you out of town on an unfamiliar route. (.99)

Flashlight by Rik for iPhone and Brightest Flashlight turn your phones into flashlights. (Free)

 

Hurricane Tracker is for serious weather junkies and people who want to be better-informed. (Free)

Life360: This GPS tracking system can help you locate your loved ones.  (Free)

5-0 Radio Police Scanner Lite Picks up police band radio. (Free)

GasBuddy – Uses your GPS to display up-to-the-minute gas prices near you. (Free)

Hands-Only CPR walks you through the two-step checklist: call 911, and start chest compressions. (Free)

I've installed all of these on my iphone.