Do you want to be a cool secret agent and command your app just with your voice? Do you want to enable your users to quickly use your app while hands free or while doing other tasks. Meet Cortana, ready to do your bidding (or tell you a bad joke). Your personal assistant Cortana is inhabiting more devices and more platforms. She is even "speaking Aussie" on Australian devices and helps with making sure you get to work on time, don't miss your flight and whether you should wear a coat tomorrow. But did you know she can also be customised to work in your app?