data for manuscript titled "Smartphone Application (TracMyAir) for Modeling Exposures to PM2.5 and Ozone – Integration with Air Quality Networks and Location-Activity Sensors" by M. Breen, V. Isakov, et al. This dataset is associated with the following publication: Breen, M., V. Isakov, C. Seppanen, S. Arunachalam, M. Breen, S. Prince, T. Long, D. Heist, P. Deshmukh, K. Appel, C. Hogrefe, B. Murphy, C. Nolte, R. Owen, G. Pouliot, H. Pye, and J. Rosati Rowe. TracMyAir smartphone application for modeling exposures to PM2.5 and ozone – Integration with air quality networks and location-activity sensors. SCIENCE OF THE TOTAL ENVIRONMENT. Elsevier BV, AMSTERDAM, NETHERLANDS, 959: 178200, (2025).