SmoothSync for Cloud Calendar syncs your iCloud calendars and reminders. Due to its implementation as sync adapter it integrates seamlessly with the native calendar app and widgets and operates invisible in the background.

Also, check out SmoothSync for Cloud Contacts to sync your iCloud contacts!

Important note for Android 4.1 and Samsung users: To prevent the removal of your accounts on reboot install this app (before you install SmoothSync):
https://play.google.com/store/apps/details?id=org.dmfs.jb.workaround.icloudcalendar

Please note that there is a new issue in Android 4.4: http://code.google.com/p/android/issues/detail?id=66905
It causes accounts to be removed when an app is updated. Installing the workaround app should help.

Get support and news via email or via Twitter at https://twitter.com/SmoothSync

The app is designed to be as user friendly as possible. So, just enter your account data, select your calendar and SmoothSync will keep your calendars in sync.

This app will create new calendars on your device (one for each calendar in your iCloud account). It will not sync calendars of other account (like Google) to iCloud.

Please, if you find a bug send me an email. Without detailed error description I often can't do anything especially when I can't reproduce it.

Important! If your phone removes the accounts on reboot, move the App back from SD card to the phone. Some phones (if not all) can't handle sync adapters on SD Card properly.

The last screen shot shows the calendar selection dialog of the event editor of the stock calendar app.

Thanks to the guys at http://www.busymac.com/ for their support!!

Features:
* two-way-sync
* supports multiple accounts
* supports subscribed calendars
* initial support for attachments (Android 4.1 or newer, doesn't work with all calendars apps)
* supports reminders if this app is installed: https://play.google.com/store/apps/details?id=org.dmfs.tasks
* multiple calendars per account
* automatic calendar discovery
* automatic sync of calendar colors and names
* syncs multiple alarms
* time zone support
* customizable sync interval (default: 4h, local changes will be synced almost immediately)
* synchronizes entire calendar
* encrypts passwords


known limitations:
* no "push" support (yet)

iCloud and Apple are trademarks of Apple Inc., registered in the U.S. and other countries. The author of this app is not related to Apple in any way.

Recent changes:
Please install the workaround app before you upgrade if you're using Android 4.4 (see the app description). Also, please contact us if something doesn't work as expected.

new in 1.8.9:

more authentication fixes

new in 1.8.8:

fix some authentication issues
fix one-way-sync setting being disabled

new in 1.8.7:

add workaround for broken devices that are missing a specific database column

new in 1.8.6:

more authentication improvements
fix synced calendar selection
improve webcal sync