The present invention is directed to a digital aroma system that provides a scented air on demand. Fragrance cartridges are held in a fragrance module having a manifold and valves that are controlled by a processor. The system can open valves to direct an airflow through a selected fragrance cartridge in response to a user input or an automated control. The digital aroma system transmits fragrance information to a server which analyzes the fragrance consumption, user locations, and other user information to determine fragrance preferences and fragrance efficacy. The server provides fragrance formulation adjustments and fragrance recommendations to users computing devices.
