The document describes a new mobile application from Castorama, a home improvement store. The free app works on iPhone and Android, and provides 10 functionalities including basic tools like a scanner, favorites list, and search engine. It also offers innovative features such as how-to videos, a room dimension calculator, and the ability to virtually try decorative objects. The interactive app is intended to be very useful for do-it-yourself home projects by providing easy-to-use tools that match the brand's spirit.