The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From BioMedical Computing Ltd:
The NiCOdep application works in conjunction with Bedfont Scientific Ltd's range of Smokerlyzer products. By taking a breath Carbon Monoxide (CO) PPM reading and answering two simple questions the application will show you how dependent on nicotine you may be and offer advice on how to combat this dependency.In addition the app will also save your results, and show you a chart of your results as you progress. Tapping on an individual column in the chart displays the full data and answers for that test. Continue using the application over time to monitor your progress and help beat your habit.