Game Companion: The Witcher 3 is an unofficial app that serves as a game companion for The Witcher 3: Wild Hunt. It is a free Android platform-based app developed by Uyt Development that offers a map of all important locations of the game and a detailed description of every location.

With its filter options, users can sort locations based on their type, while marking locations as completed keeps track of the user's progress. The app also offers a light and dark theme to choose from. It works offline, and an internet connection is not required for its use. The app includes DLC, Hearts of Stone, and Blood and Wine.