The First Descendant Companion is a free Android app designed for players of The First Descendant. It allows users to access their game information seamlessly by signing in with their Steam, PlayStation, Xbox, or NEXON accounts. The app provides instant visibility into Descendants, equipped item details, and tracks real-time item research progress, ensuring gamers are always informed about their in-game assets.

In addition to real-time information, the app serves as a comprehensive guide by consolidating all item information and acquisition paths in one location. Users can receive notifications about updates and announcements, enhancing their gaming experience. The app also facilitates participation in web events directly from mobile devices, making it a practical tool for avid players looking to optimize their journey in The First Descendant.