An investment planning tool for green cities . What if they could use the app’s data to attract private investments to build green cities? Well, there’s already an app for that. A new data-driven application, the Advanced Practices for Environmental Excellence in Cities (APEX) App. A beta version of the app is available to city leadership and currently being piloted on IFC’s client cities. Once the design is finalized, the complete version will be simple, free, and accessible to everyone—from casual audiences to serious users. The app allows city planners to make cities more sustainable in four key areas—energy, water, waste, and public transport. It harnesses data insights from advanced green practices around the world to create tailored solutions for particular cities.