“…Real-time and localized information about poor air quality is now available in many cities, and can be disseminated easily through mobile apps to empower users to take protective action against harmful air quality. Air quality apps share similar features with apps for weather forecasts (Zabini, 2016), or health management (Free et al, 2013;Dorsey et al, 2017;Payne, Lister, West, & Bernhardt, 2015;Zhao, Freeman, Li, & Building, 2016). Indeed, weather apps like air quality apps, provide information about one's external environmental, and health apps provide information about health conditions and support health management.…”