What we need is a very basic e-book bookstore (in fact, a bookshelf, catalogue) + EPUB reader application, for our own content / ebooks.
It should have our design, logo, name ins tore, and visual style (colors etc), and all the elements (buttons, menus etc) must be translated to Croatian (we provide the translation).
The books in epub2 format are already stored online on our website, so this is a sort of catalogue, or a download helper.... intended for tablet and smartphone users.
No need for in-app payments or anything like that, all the books we plan to distribute are free of charge.
Thereefore, no DRM.
When a book is downloaded from our site, the user should be able to read it in the app.
Reader should contain basic functions (font size and style selection, color selection, bookmarks, text search, TOC support, orientation lock...). Precisely what Bluereader has!
No need for epub3 support, all the files we have are epub2, simple textbooks.