I actually just bought Proton Unlimited and kind of expected that I'd be able to migrate my mail, calendars and contacts completely to proton. I'm quite disappointed that this feature is not implemented. I'd be happy with a one-way sync from Proton to iCloud or iPhone memory, though I'd prefer if I could continue using the native app to edit contacts as well.
I actually just bought Proton Unlimited and kind of expected that I'd be able to migrate my mail, calendars and contacts completely to proton. I'm quite disappointed that this feature is not implemented. I'd be happy with a one-way sync from Proton to iCloud or iPhone memory, though I'd prefer if I could continue using the native app to edit contacts as well.