SmoothSync for Cloud Calendar

2.39K reviews
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About this app

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.
Updated on
Dec 5, 2014

Data safety

Developers can show information here about how their app collects and uses your data. Learn more about data safety
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2.39K reviews
A Google user
April 4, 2019
Few apps are done well enough to survive without frequent version changes. SmoothSync is a rare find that continues to work in spite of ongoing arrogance toward interoperability by each of Apple and Google. It even survived Pie and OneUI, yet a recent Android or Samsung update apparently (and silently) disabled the app on my Note 9. Once noticed, all I had to do was go to Google Play and click the button to re-enable. Bravo!
8 people found this review helpful
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A Google user
October 13, 2019
Work like a charm. Thank you the developer so much for creating this app! Now I can sync the events with my family. This app is also a two-way sync app, which means when I add calendar either on the iPhone or my another Android phone, it will automatically update on both phones. (The time that the app will automatically update depends on how you set up the interval time.) During setting up, I check mark on Periodic sync and choose 10 minutes for Sync Interval. Hope this help. :-)
8 people found this review helpful
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A Google user
May 15, 2019
I have to say that initial impressions with this app are good. I have a personal iPhone and ipad and wanted to sync my icloud calendar with android tablet that I use for work. So far the syncing is very good in both directions which is just what I needed. Tried one of the free apps, couldn't get it to work, paid £1.99 for this one and it works. Did have to create an app specific password, wouldn't work without it. So far very pleased 👍
16 people found this review helpful
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What's new

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