SmoothSync for Cloud Calendar

SmoothSync for Cloud Calendar

100,000 - 500,000 downloads

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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):

Please note that there is a new issue in Android 4.4:
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

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 for their support!!

* 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:
* 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.

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Recently changed in this version

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 1.8.5:

fixes for users having two-step authentication enabled, added support for app-specific passwords
minor fixes & improvements

Comments and ratings for SmoothSync for Cloud Calendar
  • (74 stars)

    by mcpcmjmcc on 28/12/2012

    I have downloaded Smoothsync onto my Samsung Galaxy. I can see my I Mac calendar on my Galaxy along with my other calendars but I cannot see my Samsung calendar on my I Mac. I have NOT ticked the one way sync option. Any advice?

  • (74 stars)

    by jm wylie on 14/09/2014

    Works as advertised. Really amazing.

  • (74 stars)

    by Anne Dodge on 11/09/2014

    I've reinstalled it three times - can't get dates that I put into my Galaxy S5 to sync up to icloud, only from icloud to the phone. But it works great in the other direction. There is an option to only sync one way, but I did not check this box, so not sure what the problem is. UPDATE: it's syncing from phone to ical on mac, but the appts don't show up when logging into iCloud....?

  • (74 stars)

    by Dana Seidel on 11/09/2014

    OMG...I THOUGHT ID LOST MY CALENDAR WHEN I SWITCHED FROM IPHONE TO ANDROID! My hubby & I use to share calendars on our iPhones & I didn't think we'd be able to anymore. But, this brought all my calendar entries back and we can still share calendars! THANK YOU!! Just downloaded the app & so far it worked flawlessly. I'll update if anything changes.

  • (74 stars)

    by Toni Dunbar on 05/09/2014

    After so many dud downloads, this one is a wonderful surprise - IT WORKS! Using Samsung Galaxy S5 & Macbook Pro, and installation was a breeze. May give it the fifth star after using for a few weeks.

  • (74 stars)

    by Joe Bilde on 02/09/2014

    I am using a Galaxy S5, and my boss is a devout Apple user. The app is great, except that it logs out and removes my iCloud appointments every time I reboot the phone. That's a problem.

  • (74 stars)

    by Brian Kim on 27/08/2014

    I use SmoothSync to sync my apple iCalendar and the S planner on my phone, and it worked great at the beginning. But now icloud account disappears and I have to add the account on again once in a while which is pretty annoying.