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Reminders and iCloud CalDAV

Apple's upgraded Reminders app does not share its task data through iCloud CalDAV. 2Do's iCloud option syncs with iCloud CalDAV lists, not with the Apple Reminders app itself. If a list is only available inside Reminders, 2Do cannot continue syncing that list through iCloud CalDAV.

Before iOS 13 and macOS Catalina, Reminders lists could be exposed through iCloud CalDAV. After you upgrade Reminders, Apple moves those lists into a private Reminders sync store. iCloud CalDAV still exists, and 2Do can still sync with iCloud CalDAV, but Reminders no longer reads or writes those CalDAV task lists.

For the full explanation, see:

Recovery. Don't panic — 2Do can create automatic backups of your tasks.

  1. Open Settings > Backups > Manage Auto-Backups on iPhone or iPad, or 2Do > Settings > Backups > Manage Backups on Mac.
  2. Restore from a recent backup that contains the tasks you want to keep.
  3. On the device with the restored, correct data, go to Settings > Sync > Next Sync Action on iPhone, iPad, or Android, or 2Do > Settings > Sync > Next Sync Action on Mac.
  4. Choose Replace server data, then trigger a manual sync and let it finish. This pushes the restored 2Do data back to iCloud CalDAV.
  5. On any other 2Do device that is missing or stale, choose Replace local data from Next Sync Action, then sync. This pulls the restored iCloud CalDAV copy down to that device.

Only choose Replace server data from the device that has the data you want to keep. If you choose it from an empty or stale device, that device can overwrite the good server copy. See Replace server data or Replace local data? before confirming if you are unsure.

If you want the same 2Do task data on iPhone, iPad, Mac, and Android without depending on Reminders, use Dropbox sync.

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