KOReader vs Libby
| KOReader | Libby | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | Android, Linux, macOS | Android, iOS, macOS, Web, Windows |
| Free plan | Yes | Yes |
| Supported platforms | Kindle, Kobo, PocketBook, Android, desktop Linux; macOS emulator | web, windows, macos, ios, android |
| Supported formats | EPUB, PDF, DjVu, XPS, CBT, CBZ, FB2, PDB, TXT, HTML, RTF, CHM, DOC, MOBI, ZIP | EPUB, PDF |
| Annotation tools | Yes | Yes |
| Reading sync | Yes | Yes |
| Offline reading | — | Yes |
Both are listed in Best Ebook Reader Software. On Inferse, Libby scores higher on our published basis.