If you want to try Project “Madeira” on your devices (phone or tablet for example), you can download this App from App Store or from Windows Store.
When you run them, you will see that system requires Activation Code. This is not the same as you use App for Dynamics NAV (you don’t need to put it URL). You can find this Activation Code if you open “Get The App and Activation Code” page (you can find it using search pane).
You need to type this Activation Code in your App.
After that system will require to confirm your email as account with password and just wait few seconds. After that, everything will be fine. I’ve checked it with Windows Tablet and Windows Phone and with iPhone, as well. It looks fine.