A portable computing device with methodologies for client-side analytic data collection are described. In one embodiment, for example, a method performed by a portable computing device having non-volatile memory includes the steps of obtaining event information reflecting runtime behavior of an application executing on the portable computing device; cryptographically encrypting the event information; storing the encrypted event information in the non-volatile memory; decrypting the encrypted event information; and sending the decrypted event information to a server over a data network, the decrypted event information encapsulated in a cryptographically secured network data stream when sent over the data network to the server.