One Calendar

One Calendar

All calendars in ONE place!

21K ratings
825 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • May 1, 2018
  • August 11, 2026

Features

One Calendar screenshot #1 for iPhone
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One Calendar screenshot #8 for iPhone
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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

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What's New in One Calendar

10.0.100

August 11, 2026

Upgrade to NET10

1

In-App Purchases

$5.99

OneCalendar premium

OneCalendar premium license

User reviews

Does not sync

It will not sync with all of my calendars, though it says it does. This has caused me to miss important appointments. Do not waste your time on this calendar.

Have to pay for Premium for each device

This is the first app I’ve used that wants you to pay for each device you want to use the Premium version either Android or Apple. It would be nice to pay once and use on both iPhone and iPad. I haven’t tried adding new events, but it at least got my multiple calendars displayed correctly from the start. I hope there will be an option to change the widget theme soon.
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Simple. Helpful.

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

MUCH MORE VISUALLY PLEASING

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

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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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.