Calendar 366 vs Proton Calendar
| Calendar 366 | Proton Calendar | |
|---|---|---|
| Free plan | Yes | |
| Paid from | Free | |
| Platforms | iOS | Android, iOS |
| Free plan | Yes | Yes |
| Shared calendars | Yes | Yes |
| Calendar sync | two_way | one_way |
| Mobile apps | ios | ios and android |
| Video meeting support | Yes | Yes |
| Scheduling links | Yes |
Listed together in Best Calendar Apps