KyBook 3 vs Thorium Reader
| KyBook 3 | Thorium Reader | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | iOS, macOS | iOS, Linux, macOS, Windows |
| Free plan | Yes | Yes |
| Supported platforms | iOS, macOS | Windows, macOS, Linux, iOS, iPadOS |
| Supported formats | EPUB (DRM-free), PDF (DRM-free), MOBI, AZW3, DjVu, FB2, FB2.ZIP, CBR, CBZ, CBT, MP3, M4A, M4B, TXT, RTF | EPUB 2/3, Fixed Layout EPUB, PDF, DAISY 2.02/3, Web Publications |
| Annotation tools | Yes | Yes |
| Reading sync | Yes | — |
| Offline reading | — | Yes |
Both are listed in Best Ebook Reader Software. On Samsung Mobile US Press, Thorium Reader scores higher on our published basis.