The Ignaz Handbook document describes a mobile app called Ignaz that is designed to provide clinicians with local and up-to-date clinical information on their mobile devices. Content is written and approved by local clinicians and expires if not updated within 7 days. The app uses caching so it can run without internet. It was developed through a procurement process and is owned by the NHS. Usage is analyzed anonymously to improve the app. The document outlines governance, distribution, and future development plans to expand Ignaz to more primary care and organizations.