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