Do you and/or you colleagues have highly developed skills in using InDesign CC2014/2015?
If so, have a look at in5: Ajar Productions: Design and Animation Software
P.S. Adobe is the company not the application.
I think that making an App for the store it would be to costly and would need a lot of knowledge and experience and many man hours.
I would recommend to make a PDF screen layout, yes, Ajar for HTML5 output would also be a good idea, or you could try Publish Online which will become an even more powerful tool soon.
I don't know your budget nor your basic knowledge, so I would start with more simple but good looking layout in PDF form.
My ten cents as someone who helped several Christian magazines come to birth in the past.
Adobe make many apps. In making an online PDF magazine, the typical apps used would be InDesign, Photoshop, Illustrator and Acrobat. If making an online web magazine it would be a completely different set of apps. So your first decision would be what kind of online magazine.
However, Creative Cloud subscriptions ($50 per month) would give al good selection of apps.
Adobe apps are professional tools and you may require extensive training.