I need to be able to see my calendar on both my iphone and ipad and it doesn’t seem to want to sync. 

Generated app specific passwords for both apps on both iPhone through the apps and my PC. Still asks for an app specific password. Cleared cache and cookies on my PC. Still the same thing.

Seems like there are a lot of people having this problem and all support requests are left on read with no solutions. For a paid app this is ridiculous. 

When I open the app, it looks like I have several unanswered invitations. But when I click into the tab. I have neither new nor rejected invitations. Does anyone else have this problem? What can I do to solve it?

I have 3 Google accounts and 1 exchange account.

if I receive an invitation for a google account, the invitation is generated for the exchange account, although the invitation was clearly issued for the email address of the google account. If I deactivate the calendar in the Exchange account, the invitations are assigned correctly to the google account. This occurs both on windows and iOS.

My Google-based work account is restricted to not allow us to use the standard login with Google feature, however, we can use Google's App-specific Passwords and I have done so with other applications in the past. Unfortunately, OneCalendar doesn't seem to have a way of letting me add the account with a generated App Password and I'm forced into the login with Google portal which rejects App Passwords.

Hello dear OneCal Team. Every time a change the color of a specific day in a Google Calendar, the App creates "a new calendar" with that color and with no name, so I end up having tons more calendars than I really have. Is there a way to avoid this, please? It appears like that in all app versions (Mac, iPad, iPhone, Samsung). Attached screenshot for reference.

Hi again. In the "month" view when I scoll to the left/right to see the next month, the texts from each day doesn't load in. I have to turn off and on again the calendar to load the texts correctly. Attached images for reference. This happens in the Mac version of the app. Thank you in advance <3

App version v5.2.5 build: 5.2.5

MacOS Version Sonoma 14.2.1

When I have an event (Google) on one day with a start and end time, and I move it per drag and drop in the week view to another day, it does become a all day event, I need to set start and end time again.

would like to have tasks to sync with Toodledo tasks

I have several calendars on my iCloud account. After adding an event and selecting a calendar, I cannot change it later in the event edition. Can anyone help?

Hi, I've had One Calendar Premium for years and it has worked just fine.

I have just bought a new computer (Microsoft) and uploaded the app One Calendar. The problem is the calendar is empty. I tried to enter one of my emails (jjhakan@gmail.com or joellejohansson69@gmail.com) but the app doesn't recognise either. As I've had One Calendar for years, I'm not sure which email address I used. Can you find it for me?

The app still works on my Android phone.

My name is Joëlle Johansson. Tel nr +33669470130.

Thanks in advance. Best regards,

Joëlle

Hi I use OneCalendar to see multiple calendars at once in yearly view. However I noticed that events after 2 years are not syncing from my mobile to my tablet or my Windows app. Is this something that can be fixed please? For example I added an event on my android phone for October 2026 but this is not syncing onto my laptop or tablet. I've tried updating all the apps but this does not make a difference. I purchased the premium version too hoping that would fix the problem but it did not unfortunately. I appreciate your help. Thank

Hi there, since a few weeks I can't sync anymore with my exchange server at Ionos hosting. I tried to remove the account in the OneCalendar app and even deleted and reinstalled the app.

Now I get the following error message when I try to connect to the exchange server:

"Error while adding your Exchange account: net_http_ssl_connection-failed".

I also tried to use OneCalendar without validation of the certificate with the same result.

I bought several premium versions of OneCalendar for my family to sync on all devices. Would be great if this works again ASAP.

Ik woon in België, maar ik kan de Nederlandse feestdagen niet veranderen in de Belgische feestdagen. Hoe los ik dat op? ...

It's not possible to change recurring appointments

The description pretty much says it all. I have several calendars successfully syncing to One Calendar for Android from different sources, two of them are from Office 365. All the appointments sync correctly except any recurring appointments don't sync to One Calendar. 

This calendar has deleted past events. I don’t know how to get them back as I have redownloaded all of the same calendars 

I'm trying to synchronise my Nextcloud contacts and calendar with my Android phone. I use DAVx5 and it works very well with the contacts app and the calendar app. However, I can't integrate it anywhere in OneCalendar because access via DAVx5 is apparently not possible. It can't be that you can't access device accounts. Is this a programme error? Oh yes, you can specify Nextcloud under Accounts, but this did not work with all variants and settings. Too bad, these problems/errors will probably force me to look for an alternative.

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