Fire Journal has been designed initially for iOS devices. This decision was made based on the combination of security provided via Apple, the stability of the iOS environment, and the results of early surveys that we conducted with fire and EMS personnel.
Having written this, we remain very interested in both Android and Windows Mobile operating environments. No decision has been made on if or when an Android version will be available, but when a determination is made, we'll post information on our website. If you're interested in an Android version, please let us know!