I've not logged into the app for a while but it is a real pain with the security token, the option to enter it appears after the screen with username/password, but you have to return to your android desktop to get the security token, remember it and switch back to the app to enter it before the timer runs out. Certainly is not easy! They should intergrate the security token into the app because switching apps on my android is far from easy and can result in accidently shutting down one of them