One Calendar is a productivity app developed by Code Spark.
How many times has One Calendar been downloaded?
One Calendar has been downloaded 1.8 million times. In the last 30 days, the app was downloaded 11 thousand times.
What is the rating of One Calendar?
One Calendar is rated 4.69 out of 5 stars, based on 61 thousand ratings.
Is One Calendar free?
One Calendar is free to download. The APK download size is 68.45 MB. The latest version available is 6.901.0. The last update was on November 22, 2025.
What are the requirements for One Calendar?
One Calendar requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play April 2018.
Description
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. OneCalendar integrates all your calendars into an easy-to-read overview. View and manage all your appointments, events and birthdays.
OneCalendar is available on all platforms (Android, iOS, MacOS and Windows).
Get a detailed PDF report for One Calendar with download trends, rating history,
and key performance statistics — useful for competitive research or tracking your own app.
Learn more
Are you the developer of this app? Join us for free to see more information about your app and learn how we can help you promote and earn money with your app.
I have used this for years. It gives the clearest layout of any calendar app I have seen, about the only one where I really see all my appointments. Easy to use and reliable. I paid a small one off fee so that I could have different colors for different calendars, which was well worth it.
★★★★★Conneh (Connie)· Jun 29, 2026
This app speaks caldav natively, bypassing the entire unreliable device-managed accounts sync and my calendars finally sync properly
★★★★★Daniel· Jul 17, 2026
Nice for keeping together my Google and Outlook calendars in the same calendar.
★★★★★Dibbles· May 7, 2026
Consistently good, reliable. Recommend. Perfect for multiple shared calendars and work and personal. Better than Outlook and syncs perfectly with Outlook too.
★★☆☆☆Brandi White· May 9, 2026
Works really well on phone but will not work on Cozyla. I reached out to customer service and have not gotten anything back. Now I need to find a calendar that will sync with my Outlook calendar
★☆☆☆☆B P· Jun 16, 2026
Please stop with the annoying feedback reminders. I would have given it 5 stars, but this is for those reminders.
★★☆☆☆JJO O· Jun 20, 2026
Font is WAY too small for the month widget view. I can barely read my appointments. I tried changing the font size in the android tablet settings and it didn't change the font at all. Add a setting to adjust the font size in the month widget please.
★☆☆☆☆Erin Morash· May 27, 2026
App on Android mobile UI does not connect Google or Microsoft accounts. After having trouble syncing the app on my Android device with the appointments recorded on the app on my laptop, could not reload any of my mobile accounts. I have a paid premium account, and I cannot reload my Google, microsoft calendars to my Android mobile device. There used to be a simple email contact form for malfunctions, but that's gone now too.
Google Play Rankings for One Calendar
This app is not ranked
Technologies used by One Calendar
One Calendar is requesting 13 permissions and is using 39 libraries.
Show details
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.
