Sync Issues

Preliminary steps

Problem identification

Your calendar is synchronized from one device to another using a cloud calendar.
To identify which device fails to synchronize please follow these steps.

  1. Enter a new event in device A
  2. Login to your cloud calendar (B)
    Google * (see if only one calendar is syncing)
    iCloud *
    Outlook *
    Yahoo *
    and check if the event you just created is there.
  3. If not, then the sync problem is between device A and your cloud calendar (B)
    If the event is there it means there's a sync issue between your cloud calendar (B) and device C


In 90% of cases the procedure below solves the issue.
Week Calendar uses iOS' native synchronization functionality, so this is a general iOS problem, not caused by Week Calendar.

On your iOS device:

  1. Backup your colors in Week Calendar if necessary ( Settings > General > Synchronize colors )
  2. Go to System Settings
  3. Go to Accounts & Passwords (​Calendars in iOS10 or Mail, Contacts, Calendars in iOS9 and below)
  4. In the Accounts section select the calendar having a problem (iCloud, Exchange, ....)
  5. Reset / Re-sync the calendar data by toggling CALENDAR setting OFF and ON again

You might need to reboot your iOS device afterwards, forcing it to sync.

Warning: If events are only available on device and are not synced to the cloud, resetting sync will delete the events not synchronized.
For safety you can make a backup of these events using ICS export, see

Should toggling calendar not result in desired sync you can also remove the account, reboot and then add the account again.

WiFi Issues

Please see to resolve WiFi problems.

iCloud Control Panel Windows Sync Issues

Please see