The WEAVE-Apertif survey combines spatially resolved optical and HI spectroscopic observations to investigate galaxy evolution using a representative sample of 400 gas-rich galaxies. Utilizing the WEAVE large integral-field unit (LIFU) at the William Herschel Telescope (WHT) and the upgraded Apertif system at the Westerbork Synthesis Radio Telescope (WSRT), this project focuses on the transition of galaxies from the Blue Cloud to the Red Sequence. It aims to provide deeper insights into their star formation histories, kinematics, and environmental influences, while also examining the dark matter content (including total mass and distribution) within galaxies. The synergy of high spectral resolution and broad spatial coverage offered by these instruments uniquely positions this survey to address key questions in galaxy evolution. This report presents the main scientific goals, and current progress of the survey, emphasizing its unique features, such as HI-based sample selection and advanced spectral resolution capabilities.