One Calendar is a productivity app developed by Code Spark.
Install Statistics
One Calendar has been installed 1.8 million times. In the last 30 days, the app was installed 9.8 thousand times.
User Ratings
One Calendar is rated 4.68 out of 5 stars. The rating is based on 61 thousand ratings.
App Information
One Calendar is freely available from Google Play. The app size is 70.93 MB. The latest version available is 10.110.2. The last update was on October 4, 2026.
Technical Requirements
One Calendar requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since April 2018.
Description by Code Spark(from Google Play)
The most popular app to view all your calendars like Google, Live, Outlook, iCloud, Exchange, Office365, Yahoo, Nextcloud, Synology, GMX, Mailbox.org, ownCloud and more.
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This calendar syncs perfectly with Google calendar. I like the different colors for different kinds of events.
★★★★★Furman Evans· Sep 28, 2026
Integrates with the Outlook calendar and with my wife's Outlook calendar. Easy to use.
★★★★★Charles Walker· Sep 29, 2026
Great option to link and sync multiple calendars across different platforms.
★★★★★Sheri M· Aug 28, 2026
Love this calendar. It's easy to use and lots of colors for different appointments and events.
★☆☆☆☆Tom Insley· Aug 27, 2026
Deleted the app. Didn't sync with the calendar in my Outlook for Android - in other words, useless.
★★☆☆☆Salman Shoaib· Oct 25, 2026
I've used this app for a long time, and it worked great but recently there have been changes behind the scene and One Calendar Cal DAV sync is no longer working. All attempts to raise a support case have been unsuccessful. I wish someone would respond to my queries.
★☆☆☆☆Old Mechanic· Sep 9, 2026
Someone has hacked this app and adds an "auto-pay" notice scheduled today or tomorrow supposedly to buy a gift card for a random merchant that will allegedly be charged to your PayPal account complete with the "hook" phone number for you to call if you believe there's an error. ...and get one every couple days.
★☆☆☆☆Alard· Oct 9, 2026
Stopped working with Calder Zoho calendar out of nowhere. Useless to me now.
Google Play Rankings for One Calendar
This app is not ranked
Technologies used by One Calendar
13 permissions·43 libraries
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Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
