Achy is a free iPhone application designed to assist users in managing and documenting their headache occurrences and related symptoms. This lifestyle app falls under the health and fitness category, providing a range of features that include headache tracking, customizable inputs for personal variables, and interactive data visualization through charts and graphs. Users can also generate detailed PDF reports, which can be shared with healthcare professionals for informed treatment recommendations.

The app offers a user-friendly interface that prioritizes ease of use, allowing users to maintain detailed logs of their headaches and potential triggers. Additional features include a calendar view for tracking headache history, the ability to import and export data, and various themes for a personalized experience. Achy emphasizes privacy and security, ensuring that user data is securely stored on the device.