I have following problem. I got two projects, one sharepoint-hosted app and another provider hosted app. Both contain a couple of lists. So far so good.
Now I need the data from the sharepoint-hosted app in my provider-hosted app.
This diagram explains what I need to do:
I have been searching and so far have found nothing. I don't even know if this is possible, even in farm solutions I could only achieve this with moderate effort. I hope someone can shed a little light.