This project aims to design a wearable olfactory device to support the ageing population in the future, who lives alone. It takes advantage of the Proust Effect, a sensory experience where scent and emotion is interconnected. A mobile app is also made to support the use of the Snifty device. Research on behaviour and activities of old people, above 65 years old, is done to understand the primary users. The research expands to cognitive function and ageing.