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One Calendar

One Calendar

All calendars in ONE place!

20K ratings
823 reviews
πŸ“Š Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • May 1, 2018
  • July 10, 2026

Developer

Code Spark
✨Promote your app ✨
One Calendar screenshot #1 for iPhone
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iphone
ipad
🧾$5.99
In-App Purchaseβ†˜οΈŽ
πŸ“ŒReady
Reviews summaryβ†˜οΈŽ
⭐823
Reviewsβ†˜οΈŽ
πŸ“33+ tags
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πŸ”„6+ apps
Alternativesβ†˜οΈŽ
❓5 answered
FAQβ†˜οΈŽ
πŸ“¦~ in 2 weeks
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About

Consolidate all your digital calendars into a single, easy-to-read view. Manage appointments, events, and birthdays from various providers like Google, Outlook, iCloud, and more, all within one application.

βœ“Integrates multiple calendar providers
βœ“Easy-to-read overview
βœ“Manage appointments and events
βœ“View birthdays
βœ“Cross-platform availability
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What users say

Summarized from real user reviews of One Calendar. Based on 20K reviews and a 4.8/5 average, it highlights the 6 positives and 5 negatives reviewers mention most about this Productivity app.

Positive things

  • πŸš€Easy to use
  • πŸ‘Clean and simple interface
  • πŸ‘Integrates multiple calendars
  • πŸš€Syncs across devices
  • πŸ‘Customizable colors and themes
  • πŸ‘Helpful for organizing schedules

Negative things

  • πŸ›Syncing issues
  • πŸ›Bugs and glitches
  • πŸ”’Lacks security features
  • πŸ”‹Drains battery
  • πŸ‘ŽRestrictive features in free version
See all reviews

What's New in One Calendar

6.910.3

July 10, 2026

Upgrade to iOS 26 (XCode)

1

In-App Purchases

$5.99

OneCalendar premium

OneCalendar premium license

User reviews

Most RecentHighest RatedLowest Rated

Simple. Helpful.

I just needed everything in one place - one calendar does that and more. Worth a look!
JohnnyRed1818JohnnyRed1818

MUCH MORE VISUALLY PLEASING

Much prefer this to Apples App. You can see more and it’s more customisable.
AngelDude77AngelDude77

NOT Fair, free for Mac $5.99 for iOS..

This seems like a nice capable calendar app but there is no capability to easily transfer your account access from one platform to another, you have to manually enter access codes, not a show stopper but annoying..
When I started working this on MAC, I liked it. Little did I know that when I wanted to use it on my iPhone it’s free to download but there are some very necessary features that you have to pay for like changing calendar colors (if you have more than one persons calendar displayed).
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CulmacCulmac

Hate that they always ask for a review

Above reasons
samidontcaresamidontcare

Love It So Far

I like this calendar a lot. Very easy to schedule appointments.
VsccdVsccd
See 818 more reviews

Developer apps

One Tasks
One Tasks

Manage your tasks & todo lists

πŸ“Š Productivity

(220)

Free
See developer apps

User experience

🐞

Reported Bugs

5 issues

Sync errors

Bug

Unresponsive buttons

Bug

Incorrect time zone display

Bug

Duplicate events

Bug

Inability to delete future occurrences of recurring events

Bug
✨

Requested Features

6 requests

Multiple reminders for events

Feature

Ability to edit recurring events

Feature

Option to change event calendar after creation

Feature

Printing support

Feature

More customization options

Feature

Widgets for better visibility

Feature

FAQ

What does One Calendar do?

One Calendar is an application designed to bring all your digital calendars into one centralized and easy-to-read overview. It allows you to view and manage appointments, events, and birthdays from various calendar providers.

Which calendar services does One Calendar support?

The app supports a wide range of popular calendar services including Google, Live, Outlook, iCloud, Exchange, Office365, Yahoo, Nextcloud, Synology, GMX, Mailbox.org, and ownCloud, among others.

Is One Calendar free to use?

The application is free to download and use, with the option for in-app purchases. This means core functionality is available without cost, but certain enhancements or features might require a purchase.

What platforms is One Calendar available on?

One Calendar is designed to be available on all platforms, ensuring users can access and manage their consolidated calendars regardless of their device.

How does One Calendar help manage my schedule?

By integrating all your calendars, it provides a single interface to see all your commitments, appointments, and important dates. This unified view helps prevent scheduling conflicts and simplifies the management of your daily, weekly, and monthly plans.