The State of the Air app from the American Lung Association gives you the ability to see what your lungs are collecting anywhere in the United States. Whether you're exercising, mowing the lawn or just relaxing by the pool - poor air quality can affect you, especially if you suffer with asthma, chronic bronchitis or other respiratory problems. Poor air quality can make your eyes water, irritate your nose, mouth and throat, and even damage lung tissue. Knowing the air quality can help you plan outdoor activities and help protect yourself and your family before you go outside. The app is free for iPhone and Android.