FastStone Image Viewer vs Universal File Opener
| FastStone Image Viewer | Universal File Opener | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | Yes |
| Paid from | — | $0.83/mo |
| Open source | No | No |
| Platforms | Windows | Android, Windows |
| Free plan | Yes | Yes |
| Listed formats | — | 214 formats |
| Primary access | — | mobile |
| Archive preview | — | Yes |
| Office file preview | — | Yes |
| Code file preview | — | Yes |
| In-file search | — | Yes |
Both are listed in Best File Viewer Software. On Samsung Mobile US Press, Universal File Opener scores higher on our published basis.