It's no surprise that most Americans have allergies. Or that most of them have no idea what triggers them. Zyrtec AllergyCast™ is the first app that learns what you're allergic to, then teaches you which pollen trigger your symptoms. The daily log helps you track how you feel over time, so you can better understand and manage your allergies. And the data visualization makes it simple and easy to share with your doctor.

AllergyCast triangulates pollen and weather data with how users are feeling to determine exactly what has you sneezing and gauging your eyes out. The pollen and weather inputs are collected from more than 10,000 calibrated data stations throughout the United States. To make the experience fun and to keep people coming back, AllergyCast is the first fully gamified allergy app. Each day you log symptoms, you unlock a spin-to-win game, as well as a series of unique charms with tips that are contextual to your specific allergy needs.

AllergyCast is an elegant and invaluable utility that has been downloaded more than 300,000 times. It's the #1 branded allergy app, and a top 25 weather app. Users are addicted to it, spending 15' with it a month.