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To download Calendar Cleaner from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.

Calendar Cleaner

By Aston Shaheen

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Calendar Cleaner analyzes, reports, and fixes dozens of problems with OS X Calendar and Apple Sync Services—problems ranging from the obvious, such as duplicated events, to the subtle, such as invalid calendar dates and alarms.

If you're like us, your calendar is how you manage your life. And that means that bad data can mean a really bad day—or worse. Calendar Cleaner removes duplicates, finds subtle problems with your events, and keeps everything clean as a whistle.

For more information, tips, and a FAQ, see:

*** Feedback from Users of Calendar Cleaner ***

"I adore Calendar Cleaner, by the way. It saved me the trouble of manually filtering through nearly 30,000 calendar records, dating back to 1999, to remove about 3,000 duplicate records that had been created by sync misfires over the last 10 years of Palm and Mac OS syncing." —Don N.

"Calendar Cleaner: LOVE LOVE LOVE this tool. It's saved me hours of headache and heartache." —Rich S.

"Just dropping by to say good job! it works great! I've been having some issues with a self-duplicating calendar event and it cleaned it up! Syncing now is normal and trouble free." —David C.

"Very nice tools! Great scan speed for iCal events!" —Jochen W.

What's New in Version 1.7.2

* Compatible with Mac OS X 10.11
* Bug fixes
* Minor UI tweaks
* New app icon
* Rebranded part of "Cleaner Tools for Mac"

New in version 1.7.1:
* Faster! Faster! Faster!
* Various UI enhancements and bug fixes


Screenshot 1
Screenshot 2

Customer Reviews

Not very impressed

I purchased this app based on a recommendation from the Applecare tech guy. I fully understand that they are not responsible for the quality of the app as they did not write it. My problem was that I had many duplicate appointments after transferring my mail from Outlook to the Mac calendar. I did the download while my Mac guy was viewing my screen, so I think I did what I was supposed to do in installing and running it. It is actually very simple and difficult to make a mistake and I am no novice in software use. I suspect there is a bug in the app as after I ran it, not only did it not delete duplicate appointments, but it multiplied them, actually scheduling ALL of my appointments to occur every day out to the limit of the calendar! With the help of the tech, I was able to delete all appointments in the calendar and from the cloud, restore the calendar to what it was earlier that day. I would say that it may have been something in my system that caused it because no one would buy it if all had my experience. I would recommend that the designers take a look and fix it.

High hopes,terrible results

I had high hopes for this app, but after running it I found that calendar colors for some calendars were now gray, and that some events had been duplicated several times. events from years ago that repeated 10 times suddenly are repeated forever. Other events were duplicated but on a different calendar. It took a long time to get things good going forward, I didn’t bother with past items that were messed up. I won’t use it again.

Colors gone, events repeat forever

All my colors disappeared, a bunch of yearly events now repeat every day, the app froze up midway through the process as well. My calendars are now worse rather than better. At least I have backups and I’m only out four bucks. Disappointing.

Calendar Cleaner
View in Mac App Store
  • $4.99
  • Category: Utilities
  • Updated:
  • Version: 1.7.2
  • Size: 1.0 MB
  • Language: English
  • Seller:

Compatibility: OS X 10.7 or later, 64-bit processor

Customer Ratings

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