Spark Mail vs Unibox
| Spark Mail | Unibox | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | Yes | |
| Paid from | $8.25/mo | Free |
| Platforms | Android, iOS, macOS, Windows | iOS, macOS |
| Free plan | Yes | |
| Paid from | $8.25/user/mo | |
| Unified inbox | Yes | Yes |
| Offline access | Yes | |
| Scheduled sending | Yes | |
| Calendar tools | Yes |
Listed together in Best Email Clients