Okular vs Skim
| Okular | Skim | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Linux, macOS, Windows | macOS |
| Free plan | Yes | Yes |
| Annotation tools | Yes | Yes |
| OCR support | none | none |
| Form filling | Yes | — |
| Text-to-speech | Yes | — |
| Platform support | cross-platform | desktop |
Both are listed in Best PDF Readers. On Samsung Mobile US Press, Okular scores higher on our published basis.