CO2CO2Puff Sensors app for iPhone and iPad
CO2CO2Puff sensors, helps user to see the air quality information in real time using a small sensor device, the sensor device can be purchased from http://www.cocopuff.org/
CO2CO2Puff sensors has following functionality
1) Realtime air quality information
2) Hourly, weekly, monthly graph view to visually compare the air quality.