One Calendar

Code Spark Productivity iPhoneiPadiPod touchMac

One Calendar is a free Productivity app for iPhone and iPad by Code Spark. Rated 4.8/5 from 20,656 ratings. Requires iOS 15.0. Updated September 19, 2026.

Rating: 4.8; 20.6K ratings
Price: Free; on the App Store
Size: 89 MB; Age 12+
Updated: Sep 19; 2026 · v10.100.11

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About One Calendar

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.

Ratings & reviews

4.8

20.6K ratings

5 ★ 82% 4 ★ 13% 3 ★ 3% 2 ★ 1% 1 ★ 1%

What’s new

Version 10.100.11 · Updated September 19, 2026

Fix iOS 26/27 freeze/hang issues

App privacy

The developer, Code Spark, reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

Purchases: Purchase History
Contact Info: Email Address

Used for: App Functionality

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

Usage Data: Product Interaction
Diagnostics: Crash Data

Used for: Analytics

App details

One Calendar is a free Productivity app for iPhone, iPad, iPod touch and Mac, developed by Code Spark. It is rated 4.8 out of 5 from 20,656 ratings on the App Store, requires iOS 15.0 or later, is 89 MB to download and is available in 16 languages. It was first released on May 1, 2018 and last updated on September 19, 2026.

Category: Productivity
Rating: 4.8 / 5 (20,656 ratings)
Price: Free
Version: 10.100.11
Size: 89 MB
Requires: iOS 15.0 or later
Compatibility: iPhone, iPad, iPod touch, Mac
Languages: English, Catalan, Czech, Danish, Dutch, French, German, Hindi and 8 more
Age rating: 12+
Released: May 1, 2018
Last updated: September 19, 2026
Developer: Code Spark

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Alternatives to One Calendar

Looking for apps like One Calendar? Here are 6 similar apps on the App Store. The highest rated is minical - Planner & Calendar (4.8/5), and all 6 are free to download.

One Calendar vs. alternatives
App	Rating	Price	Last updated
One Calendar	4.8 / 5 (20,656 ratings)	Free	September 19, 2026
Calendar · Planner & Reminders	4.6 / 5 (59,125)	Free	Sep 4, 2026
Awesome Calendar 2	4.6 / 5 (4,935)	Free	Nov 7, 2023
Tiny Calendar: Planner & Tasks	4.6 / 5 (20,627)	Free	Nov 5, 2025
PocketLife Calendar	4.7 / 5 (41,644)	Free	Sep 18, 2026
SimpleCal: Simple Calendar	4.7 / 5 (17,553)	Free	Sep 27, 2026
minical - Planner & Calendar	4.8 / 5 (5,891)	Free	Sep 11, 2026