The クトゥルフ神話TRPG ルールブックPLUS app is the ultimate companion for TRPG enthusiasts. It includes over 2.8kg of related books, all in one app, with features such as tabs and search functions that enhance the TRPG experience. The app is free to download, and you can start playing the クトゥルフ神話TRPG right away.

The app allows you to access various source books, scenarios, and the new クトゥルフ神話TRPG Rulebook, which is easy to read with highlighted keywords and skills. The app also features a quick search function, and you can customize it by adding notes, bookmarks, and markers. The tab viewer makes it easy to switch between pages of multiple books.