Replifactory is a device for running scientific adaptive evolution experiments – a “bacterial fitness trainer” designed with usability in mind. By simulating the natural process of evolution within controlled laboratory settings, it allows users to observe how microbial populations respond and adapt to selective pressures over time. Replifactory’s affordability and scalability make it an ideal solution for resource-constrained research settings and educational institutions. By reducing the cost and logistical challenges associated with running specialized experiments, it enables researchers and educators to expand their scientific endeavors. This can help advance our understanding of evolutionary processes while empowering future generations of scientists to explore the wonders of biology.