1. A tangible machine-readable medium comprising instructions which, when executed, cause a machine to at least: process usage data to identify first and second user-invoked applications which were accessed sequentially on a wireless device in a time period, the first and second applications being accessed sequentially without an intermediary application being accessed after the first application is accessed and prior to the second application being accessed; build, using an aggregator, a behavior model based on the identified applications, the behavior model to describe user behavior associated with the wireless device; execute, using a predictor, the behavior model to predict usage of an application on the wireless device; based on the prediction, monitor usage of the wireless device to determine an accuracy of the prediction; and update the behavior model based on the accuracy of the prediction, at least one of the aggregator or the predictor includes a logic circuit.