GameMaster Dice is a dice rolling application designed for the 3D20 role-playing game (RPG) system. It offers a clean and intuitive interface that caters to the needs of both game masters and players. The app features four configurable dice buttons, which can be customized by long-pressing them. Additionally, it has a backlog of recent dice rolls and remembers the most commonly used dice.

One of the key strengths of GameMaster Dice is its support for a wide range of RPGs, including Dungeons & Dragons (DnD), Neuroshima, Monastyr, Star Wars RPG, Shadowrun, Fudge-based games, and other d20 and 3d20 titles. The app is completely free and open-source (GPL v2), with no ads or statistics collection.