The クトゥルフ神話TRPG ルールブックPLUS公式アプリ is a comprehensive app that combines over 2.8kg of related books for the クトゥルフ神話TRPG game. With unique app features such as tabs and search functions, it offers a more enjoyable TRPG experience.

The app allows users to start playing クトゥルフ神話TRPG for free. It provides access to various sourcebooks, scenarios, and rulebooks, including the "新クトゥルフ神話TRPG ルールブック" and highlights important keywords and skills with tags for easier reading. The app also offers quick search functionality and customization options such as notes, markers, and bookmarks. With the "タブ" viewer, navigating between pages of multiple books is made easy.

This app is recommended for those who want to conveniently carry rulebooks and sourcebooks, enhance their クトゥルフ神話TRPG sessions, make use of books for scenario creation, and further enjoy the related books and content of クトゥルフ神話TRPG. It is also suitable for beginners who are unsure where to start with クトゥルフ神話TRPG.