K-9 Mail vs Polymail
| K-9 Mail | Polymail | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | $10/mo |
| Open source | No | No |
| Platforms | Android | Web, Windows, macOS, iOS |
| Free plan | Yes | No |
| App coverage | mobile | all |
| Unified inbox | Yes | Yes |
| Offline access | Yes | — |
| Scheduled sending | No | Yes |
| Calendar tools | No | Yes |
| Paid from | — | $10/user/mo |
| Account limit | — | 2 accounts |
Both are listed in Best Email Clients. On Samsung Mobile US Press, Polymail scores higher on our published basis.