I recommend this app for headache sufferers. This app is intuitive and easy to use, and developed by a physician. All the components are there to help a physician manage their chronic headache patients. I love the ability to add a custom trigger to your list of headache triggers, or just choose your common triggers for your list. Users have asked for a graphical report instead of just a list report but I dont think the lack of graphs limits this apps helpfulness for physicians. Five out of five stars for this awesome app!
For those that prefer to try it before you buy it, the "iHeadache lite" version of this app is exactly like the paid version , however it only tracks two weeks of information. Plus, if you upgrade to the full paid app, you will lose your two weeks of data!
The only thing missing is a way to sync it online so you dont lose data if your phone gets lost...I hope that is coming.
cholesteroldoc about iHeadache - Headache & Migraine Diary