1. A method comprising: monitoring traffic associated with an end-user device communicatively coupled to a network system over a wireless access network, the traffic comprising one or more data transfers; identifying, in the traffic, particular data transfers within a service activity category, the service activity category identifying a set of one or more service activities less than all service activities associated with the end-user device, the service activity category identifying at least one of a particular end-user device application and a particular network communication end point; determining a service usage measure based on the identification of the particular data transfers within the service activity category; and providing a notification to the end-user device, the notification based at least in part on the service usage measure, the notification configured to assist in causing a user interface of the end-user device to present notification information.