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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

Open the Mac App Store to buy and download apps.


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

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.

It crashes all the time

Terrible experience. It didn’t work at all. It crashes all the time…:(

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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