This Mobile Webapp is a proof-of-concept of mixing D3.js with a touch UI. The application shows TV audience and market shares for 8 TV channels across several days. The UI accepts touch gestures like tap to select, drag to scroll, pinch to zoom, and swipe to change day. The interface is in French, and the data is fake. The code is open-source and available at github.com/marmelab/MobileAudience.