EPUB Reader is compatible with a range of eBook formats beyond EPUB, including PDF, MOBI, and AZW. This versatility allows users with different types of eBook collections to read their books without compatibility concerns.

Yes, EPUB Reader offers extensive customization options. Users can modify font sizes, styles, background colors, and margins, as well as line spacing. Additionally, there is a night mode feature to reduce eye strain during nighttime reading, enhancing overall comfort across devices.

EPUB Reader supports cloud synchronization, allowing access to your library and reading position across multiple devices. By integrating with cloud services like Google Drive or Dropbox, bookmarks, notes, and highlights are preserved, enabling a seamless reading experience.

EPUB Reader provides a free version with basic reading features. A premium version is also available, offering additional benefits such as ad-free reading, advanced customization, and priority support. Users can select the option that best fits their needs and budget.

EPUB Reader can open DRM-protected books if they have been legally purchased and the user has the necessary rights. It supports Adobe DRM, allowing users who bought books from stores like Adobe Digital Editions to read their files legally within the app. It's important to ensure books are obtained legally to avoid issues.