Methods and systems are disclosed for monitoring traffic associated with an end-user device communicatively coupled to a network system over a wireless access network, identifying in the traffic particular data transfers within a service activity category, determining a service usage measure based on the identification of the particular data transfers within the service activity category, and, based at least in part on the service usage measure, generating a notification configured to assist in causing a user interface of the end-user device to present device-specific service usage information.