Mendix Developer App
While developing a hybrid mobile app, you cannot simply test it in your mobile browser because the native widgets will not work. Some of these widgets will offer an alternative implementation for when they are running in an ordinary browser; others will not work at all. To see what your application will look like inside the PhoneGap wrapper, you can use the Mendix Developer App. Via ‘View app’ in the toolbar or through the ‘Run’ menu you can reach the hybrid mobile app dialog. It shows a QR code that can be scanned with that app. This is a quick way to load your app into a PhoneGap compatible environment.
See also this page for information about how to download the Mendix Developer App.
Note that your mobile device has to be on the same network as your development machine for the Mendix Developer App to work. If this is the case and the connection still fails, make sure that communication between devices is allowed in the Wifi access point.