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