Meet Wing: a smart, portable device that connects to your smartphone through the headphone jack and lets you measure your lungs. It is designed to help people with asthma, CF, or COPD control their condition. The companion app gives you information on how much air you can blow out in one second and your peak flow. It also helps you detect early-warning signs for attacks.
Wing is easy to take around and operate. It lets you track your data over time and share it with your doctor. The project is getting funded on Indiegogo at this time.