Breathe smarter, anytime, anywhere. TrackAir is a wearable air quality monitoring device for sensitive groups to avoid air pollutants and allergies and ensure a safe environment. As small as a smartwatch, TrackAir provides its users with continuous air monitoring and advice on healthy travel routes. Consequently, we can breathe smarter tomorrow by crowdsourcing air quality data, integrating it with route planning, and synergizing it with other smart city data.