Previously, this was only available on smaller devices like, phones, tablets and computers. (techradar.com)
There's also some discussion on how to optimize content for small devices like smartphones where a full - length comic book might be too long (or too small) to enjoy. (mashable.com)
PDF formats can be read in most browsers, computers, tablets, smart phones etc... However, on small devices like smart phones a PDF can be difficult to read. (editepub.com)