The New Yorker on iOS is a great example. It's an atrocious app. Each issue takes >100MB, there's no font resizing or dark mode, and articles are laid out such

The New Yorker on iOS is a great example. It's an atrocious app. Each issue takes >100MB, there's no font resizing or dark mode, and articles are laid out such that 1/3rd of the screen is white space. A magazine-porting framework for iOS and Android would rock. Sales would be tough, though--you'd probably have to partner closely with Conde Nast or another big publisher for v1.0, and...well, good luck with that.