VU.CITY is a collaborative platform that uses digital twins of cities, tools, and data to support users in creating, refining, and sharing the journey of city transformation. It supports built environment professionals and plans to expand to help all industries that impact cities. It provides a shared visual perspective to understand the character of a city and facilitates a city-wide constructive narrative and inclusion with change. The platform covers the whole of London and the centres of 26 major UK and international cities, helping city changers make better design and planning decisions faster.