Checker Plus for Gmail vs Spike
| Checker Plus for Gmail | Spike | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | |
| Paid from | Free | $4/mo |
| Platforms | extension | Android, iOS, macOS, Web, Windows |
| Free plan | Yes | Yes |
| App coverage | desktop | all |
| Offline access | Yes | |
| Calendar tools | Yes | Yes |
| Paid from | $4/user/mo | |
| Account limit | 3 accounts | |
| Unified inbox | Yes | |
| Scheduled sending | Yes |
Listed together in Best Email Clients