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CaliBrate allows you to create and batch process Calendar (iCal) events.
  • Batch process Calendar or iCal events.
  • Flexible search criteria & range match presets
  • Search for and remove duplicates.
  • Search for annual recurring events and delete later non-recurring duplicates.
  • Move or archive events to new calendars or delete them.
  • Auto-reformat, modify, or set event titles, notes, locations, and URLs.
  • Add or clear alarms and attendees.
  • Modify or clear recurrences.
  • Edit, create, and delete individual events in event drawer.
  • Use an existing more...

What's New

Version 1.8.5:
  • Compatibility update for Mavericks.
  • When moving or copying recurring events on 10.9+, excluded dates are no longer retained, due to an OS X bug that hangs Calendar.


OS X 10.5 or later

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CaliBrate User Discussion

Nobody has reviewed or commented on this app yet. Add your own comment and get a discussion going!
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Porg Member IconComment+0

Does the find & replace function support regular expressions?
If that function would work, I'd test/buy this app.

Reply0 replies
Version 1.8.4
redragon2501 Member IconReview+0

Does amazing fast and simple impossible batch actions for ical events!

Reply0 replies
Version 1.8.3
Coolmemin Member IconReview+28

Awesome app! I love it!

Reply0 replies
Version 1.7.4
Beang Member IconReview+3

This app is amazing!!!! Totally worth 8 bucks, and more!

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Version 1.7.3
Steven Goodheart Member IconReview+442
Steven Goodheart

Used it a few minutes and immediately bought it. It's so easy to use and has a great, intuitive interface. The number of useful things this program does for a mere $8 is astounding. If you use iCal intensively, this is a great investment for a very reasonable price. A must-have.

Reply0 replies
Version 1.7
nicksloan Member IconReview+81

Very flexible and effective tool for searching iCal and making batch changes to events. Quick response from the developer when I reported a problem with date formatting. Altogether a nice bit of software to have and to use.

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Version 1.2
Mike_the_Magician Member IconComment-1

For 8 bucks you have to work harder, mate. Kills my iCal regularly. Get many AppleScript Errors while adding relative alarms to Events. Afterwards your GUI crashes as well

Reply4 replies
Version 1.0
Wooden Brain Concepts (Developer)

As always, please email developers with bug reports. They will be corrected when they are known. Unfortunately if this is a problem it was not caught for the 1.1 release but will be for the next.

Wooden Brain Concepts (Developer)

The errors related to "adding relative alarms to Events" was due to a bug in Leopard. It had not been caught until I saw this posting. It is now fixed in 1.1.2. Other mentioned bugs I have not been able to reproduce. The GUI crash may be related to the first bug. Once again, it will be much more helpful to communicate with developers when software has problems so that those problems can be fixed. Developers may only read forum comments when they post new versions if at all, so that just delays getting them fixed.


It's difficult (why, I don't know) to get people to understand that MacUpdate is an outlet for softwares and that when issues arise with a given software that the developer(s) should be contacted directly via their respective websites.

I post frequently in response to 'trouble' posts here at MacUpdate, telling people to contact the developer.

We're (MacUpdate) not the manufacturer, folks!


@MACUPDATE ADMIN Then why have a Troubleshooting category if you don't want these types of posts? I have found that, when a developer does not respond to emails, posting the exact same message to macupdate.com gets an immediate response. Should you shun or welcome the opportunity to be the Twitter of Mac software?

There are no Ratings for this App yet.
> 5 5


Current Version (1.x)


Downloads 8,117
Version Downloads 489
License Demo
Date 14 Nov 2013
Platform Intel 64 / OS X / PPC 32 / Intel 32 / PPC 64
Price $8.00
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