Duty Pro is a comprehensive pocket police guide app designed for iPhone users. It is developed by Simon King and falls under the Education & Reference category. Duty Pro is a full version app, which means there are no monthly subscriptions or additional fees. It offers a complete list of criminal offences and provides a step-by-step guide for the investigation process, including offence-specific requirements.

This app is revolutionizing the way British police officers work by providing them with a highly effective tool to look up and reference criminal and traffic offences and procedures during the course of their investigations. The app offers two outstanding display modes: 'Simple' mode, which provides offence wording, prosecution time limits, charging codes, and maximum sentences in a clear and easy-to-navigate interface, and the exceptional 'Guidethrough' mode, which provides dynamic and smartly-written guidance through each step of the investigative process.

Duty Pro also includes a contacts list with helpful contact information of police services and other linked organizations around the country, a wellbeing directory providing information on where to find help for everything from mental health to financial services, and a document library with useful PDF documents and publications for police officers and victims from various organizations. It is also suitable for other members of the policing family, including PCSOs, Special Constables, and civilian investigators.