1. A method, comprising: receiving information identifying a first Internet data service of two or more Internet data services accessible to a user of an end-user mobile device via a wireless network; generating instructions based on the information, to instruct the end-user mobile device to generate a first measure of the first Internet data service and to report the first measure to a network-attached server, the first measure expressing data usage only for the first Internet data service of the two or more Internet data services, the first measure providing a measure of usage of a particular type of network to access the first Internet data service, the particular type of network selected from among several network types that the end-user device is capable of connecting with to access the first Internet data service, the first measure excluding any usage to access the first Internet data service of network types other than the particular type of network; providing the instructions to the end-user mobile device; receiving the first measure; and determining whether the first measure is consistent with a second measure of the first Internet data service, the second measure generated independently from generation by the end-user mobile device of the first measure.