"Storm!" is a free iPhone app developed by Riyad Habash. It falls under the Lifestyle category specifically designed for weather enthusiasts. With its unique approach, this app allows users to calculate the distance of lightning storms from their location based on physics facts.

The app's functionality is simple and straightforward. When you witness a lightning strike, you can tap on the "lightning" button. Then, as soon as you hear the accompanying thunder sound, press the "Thunder" button. "Storm!" will then provide you with an approximate distance from the lightning storm.

With its intuitive interface and accurate calculations, "Storm!" is a handy tool for anyone interested in tracking the distance of lightning storms. Whether you're an outdoor enthusiast or simply curious about the weather, this app provides a quick and convenient way to gauge your proximity to lightning storms.