A process tracks user advertisement exposure. To enroll a user as a panelist, the process generates a panelist ID and sends it to the user's home router. The process receives a message from the router that includes the panelist ID and a cookie ID associated with a web application. The cookie ID identifies the application and a personal device. The process stores the correlation between the panelist ID and the cookie ID in a database. The process receives an advertisement request from the personal device that includes the cookie ID. The process selects an advertisement and sends it to the personal device. The process also stores information corresponding to the advertisement request in an advertisement log, including the cookie ID and an advertisement identifier. The programs correlate the advertisement request with the panelist ID using the cookie ID. The process generates a report of the user's online advertisement exposure.