FDAnews
www.fdanews.com/articles/149724-see-how-healthy-your-lungs-are-mdash-just-blow-into-your-phone

See How Healthy Your Lungs Are — Just Blow Into Your Phone

September 26, 2012
Today, patients with chronic lung conditions such as cystic fibrosis or asthma can’t easily monitor how their airways are doing. Instead, they have to go to the doctor’s office and blow into a special device called a spirometer as hard and fast as they can.
CNet