I am in the process of starting a digital magazine. I've done research, but I know the community here likely has a diamond in the rough product! What platforms would you recommend for developing a magazine app in the App Store? Similar to products like http://www.magcast.co/ or http://www.pixelmags.com/
Your best bet would be to look for a pre-made source code and just edit out what you want to add in/remove. From my experience it is far easier doing this than paying a developer to make one from scratch -- if you're on a low budget. Also as far as I am concerned there is not a single CMS which has a native IOS app specifically for what you want to do, however I could be wrong.
Check out markets such as Chupamobile and CodeCanyon and see if they offer anything that you are looking for.
If you need any help regarding the business plan/monetization, let me know, I am here to help :).