WeatherX Forecast is a free iPhone app developed by CIRRUS HEALTHCARE PRODUCTS LLC in the Lifestyle category, specifically designed for those who suffer from weather-related headaches. It is intended to be used in conjunction with WeatherX earplugs as a proactive approach to help manage headaches caused by shifts in barometric pressure.

The app offers a full 5-day barometric pressure forecast, a historical record of the same, and push notifications alerting users of upcoming weather systems. Users can customize their pressure threshold according to their sensitivity to barometric pressure shifts in the app's settings. Additionally, the app allows for a changeable location and presents barometric pressure data in an organized and easy-to-understand way.

Overall, WeatherX Forecast is an excellent tool for those who suffer from weather-related headaches. It offers a comprehensive solution to managing the symptoms and provides users with timely information to take proactive measures.