Have a notification explaining to clinician's that they can not sign up using the app, they must use a desktop. When I tried to sign up from the app on my iPhone I could not see an option to register myself as ‘clinician’ so I spent lots of time trying to work it out on the app. A notification/warning on the sign-up page on iPhone app would save clinicians time and frustration if they download the app then can’t seem to get it working from a clinician point of view.