Contact One Calendar

Contact One Calendar Support


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About: 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.



One Calendar Customer Service 👿🤬😡😠💢😤

One Calendar Contact Information

Listed below are our top recommendations on how to get in contact with One Calendar. We make eduacted guesses on the direct pages on their website to visit to get help with issues/problems like using their site/app, billings, pricing, usage, integrations and other issues. You can try any of the methods below to contact One Calendar. Discover which options are the fastest to get your customer service issues resolved..
The following contact options are available: Pricing Information, Support, General Help, and Press Information/New Coverage (to guage reputation).



NOTE: If the links below doesn't work for you, Please go directly to the Homepage of Code Spark



Verified email ✔✔

E-Mail: [email protected]

Website: 🌍 Visit One Calendar Website

Privacy Policy: http://www.onecalendar.nl/onecalendar/privacy-policy

Developer: Code Spark


73.33% Contact Match

Developer: Google LLC

E-Mail: [email protected]

Website: 🌍 Visit Google Calendar Website






Read 4 Customer Service Reviews 😭😔💔

4.8 out of 5
Bill Niehaus
2023-04-26

I have been using OneCalendar for about a year now. I'm looking for a calendar that retains my records for 10-20 years so I can enter historic events and have a convenient way to search for them later on. Can you tell me how long OneCalendar will keep my records? Thank you.

Major flaw with subscribed calendars and flaw with reminders

2022-04-28

by Astrosabby

Updating to add a major flaw I’ve come across. Subscribed .ics calendars don’t show double-booked slots. It will only show one of the items in that time slot. Complete killer for me. I am often double booked and have to make a game time decision which one to go to. I’ve missed important meetings because of this issue.

Already noted: If you can’t add a reminder to an imported web cal event (or even just import the reminder from the original event), then this app become pretty useless. For google and iCloud calendars, it’s ok, but the reminders still need work.

Wrong day of the month on the Front page

2022-05-05

by What Day Is It Today!

It’s absolutely ridiculous that the front page of the calendar only shows the number one!!! One of the major points of a calendar on an iPhone is it when you wake up in the morning or at any time you can just look at the front page and you see what day it is. Instead, you have to go into the calendar to find out what day it is. Well that is extremely annoying. Therefore I will be looking for another calendar. How could anybody come up with such a ridiculous idea. It is absolutely outrageous.

What Happened?

2022-05-12

by LISCTR

This is my favorite of all the calendar apps available for iPhone, but something changed in the last few months and now you can no longer “delete this and future” events. Why? Why can I only delete everything past and future or have to go through the future and delete one at a time? Life changes. Reoccurring events sometimes have to be deleted for the future but that doesn’t mean I want the past deleted as well. Please fix this!!!!! Thank you.


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  1. Pulling issues faced by users like you is a good way to draw attention of One Calendar to your problem using the strength of crowds. We have over 1,000,000 users and companies will listen to us.
  2. We have developed a system that will try to get in touch with a company once an issue is reported and with lots of issues reported, companies will definitely listen.
  3. Importantly, customers can learn from other customers in case the issue is a common problem that has been solved before.
  4. If you are a One Calendar customer and are running into a problem, Justuseapp might not be the fastest and most effective way for you to solve the problem but at least you can warn others off using One Calendar.


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