One of the grand topics in biology is the detailed pattern of relatedness among life forms, reflecting the process of lineage diversification which formed the evolutionary Tree of Life. These phylogenetic trees are the central framework for a wide range of biological disciplines ranging from medicine and pharmaceuticals to ecology and evolution. However, for the majority of people, the Tree of Life remains largely unknown and has little connection to their daily lives. Here, we introduce TreeBit, a smartphone game designed to teach young adults about the Tree of Life through a combination of game levels and a framing game world. TreeBit blends an innovative art style, current scientific research, and progressive game mechanics in an educational game for mobile devices.