I have signed and installed the app, created articles and collections all according to the guide, and clicked preview all content, but the app opens to a blank screen? Prior to clicking preview all content the app showed with a message stating "no content found tap to refresh". Now the app opens to a blank screen? Ideas?
I think the preview button is just to content unpublished.
I am publishing all my article and collections, then the content show in app.
Other point. Pay atention if the app was build to right project
A few things to check:
1) Did you build the app as a preview app? Make sure you checked the box for that on the first tab of the App Builder screen.
2) If you didn't build as a preview app, did you publish all your content?
3) Are you sure you built the app against the same project as your content is in?
4) Did you make one top-level collection or two? If you made two, is there content in the appropriate top-level collection for the device you are testing on?