As an existing user, this is really the last critical issue for Proton Mail for me. I prefer to have my email and calendar in one place. The calendar especially is very important for users to be able to readily access, otherwise it's not useful. I'm fine with using the proton app for phones, but there is no such app for desktop. Since you already allow syncing with outlook for email, it seems logical to support the calendar feature as well.
Van K
As an existing user, this is really the last critical issue for Proton Mail for me. I prefer to have my email and calendar in one place. The calendar especially is very important for users to be able to readily access, otherwise it's not useful. I'm fine with using the proton app for phones, but there is no such app for desktop. Since you already allow syncing with outlook for email, it seems logical to support the calendar feature as well.