The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From iHealth Ventures:
Headache and Migraine Diary for iPhone, iPod Touch & IPad to help you keep track your headaches. It help you track triggers, the effectiveness of medications and any patterns to your headaches to identify causes. Carry it around in your iPhone or iPod Touch all the time to keep on top of your Headaches/Migraine's. FEATURES* EASY and INTUITIVE interface to record information about your headaches.* MONITOR changes in your headache over time. * The LOG HISTORY display allows one to view all historic data.* Add free text NOTES to each log.* No Monthly Subscription Fee (unlike some other iPhone apps). You pay once for the app and get all upgrades for FREE!. * No Internet Connection required to access data, use the app anytime, * CUSTOM Reports - Daily, Weekly, Monthly and more.. * GRAPHICALLY visualize your weight loss (weekly, monthly, 3-monthly)* Privacy and Security - All data is stored locally on your iPhone for your privacy. * EXPORT to Microsoft Excel : data is semi-colon delimited. * Takes very little of your iPhone memory, extremely small database size.This app saves headache information and calculated data. It maintains a detailed log of your headache episodes, triggers and steps you took to avoid them.For any issues with the app or request for new features, please email us at email@example.com. We look forward to your feedback and suggestions for improving our product. TRY OUT OUR OTHER POPULAR PRODUCTS:* Nutrition FactsSearch and display nutrition information for popular foods (including fast-foods)http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=317469756&mt=8* iExercise JournalTrack you daily Exercise/Physical activities. It is available at: http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=308165301&mt=8* BMI Calculator /Healthy Weight TrackerHelps you monitor and track your BMI.http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=307576754&mt=8