OGM: Map for Ghost of Yōtei is an educational app designed to enhance the gameplay experience of Ghost of Yōtei. Available for Android, this free app allows players to access a fully offline map that requires no internet connection once downloaded. Users can track their progress on various collectibles, including Charms and Shamisen Songs, with an intuitive interface that supports multiple languages. The app's smart caching system ensures that all essential data is readily available, and additional location screenshots can be downloaded as needed.

The app also features a personal explorer's journal, enabling users to add unlimited notes and markers for significant locations. With a powerful filtering system, players can focus on specific categories and save their custom presets for easy navigation. The community-driven aspect allows users to suggest new locations, making it a collaborative tool for enthusiasts. Overall, OGM: Map for Ghost of Yōtei is a reliable companion for players seeking to uncover every secret in the game.