Extreme Calendar 4+

Family & Work Agenda Planner

Birdsoft LLC

Designed for iPad

    • $7.99
    • Offers In-App Purchases



One of the most powerful calendars on iOS. Advanced views with plenty of options all designed for speed and flexibility.

You wont get this much information at a glance from any other calendar, and adding events in-line allows you to get in and out and on with your busy day.

Based on Extreme Agenda, it gives you the powerful calendar based views you want at a low price, and allows you to purchase the other features of the full Organizer once you need them.

Features Include:

Great Calendaring
• Powerful views including Year, Month, Week, Upcoming Agenda List, and Day.
• Pull Birthdays and Anniversaries from your contacts with pictures.
• Advanced repeating event options.
• Move/Copy Events
• Military time, ISO week, and week start options.
• Uses and expands on your native calendar data.
• Sync like you would with the default calendar(Google, iCloud, Exchange).
• Next month preview option on Month View
• Uses time bars and icons to keep you informed at a glance
• Put event text right on calendar
• Filter events based on iCal calendars.
• Almost 200 professional icons to mark your events
• Natural Language Entry
• Event Templates
• Email Events
• Drag-n-Drop Events

Power and Flexibility
• Universal Support
• TextExpander Support
• Portrait and Landscape Support.
• Retina and iPhone 5 Display Support.
• Background and color theme choices.
• Help System

• Easily upgraded to Extreme Agenda Planner


InApp Purchase

When you are ready to upgrade just pay the difference and your Extreme Calendar becomes Extreme Agenda. Doing so adds powerful contact, task, note, and list views along with search, weather, private filtering, a status coloring choice, and over 800 more icons. And it adds categories for coloring, icons, and advanced filtering.

Otherwise if you want it all now, look for 'Extreme Agenda' in the AppStore.



You can tap-h-hold in the main calendar days and in the time area of the timeline day view for an 'add and paste' toolbar. Copy/Move, used with the paste, are in the toolbar on each event in timeline day.


Tech Support / Reviews

Please email us with feature suggestions, bug reports, or you can't figure something out instead of using the reviews if you are rating low, its not good practice to get what you want. Or find Extreme Agenda on Facebook or give @birdsoft a shout out on Twitter and let us know there!

We address most problems reported right away if they really are problems and will help you find a solution. We also list known problems on our site and how they are being resolved.

If you like the app and it works fine for you and/or we worked to get in the features you requested please leave a review to let people know.

We're working hard to give you everything you want in a calendar.


Get Organized. Go Extreme!

What’s New

Version 5.28

Settings screen updates for iOS 17.

Please help support Birdsoft by checking out our new Ulti-Planner calendar app and maybe giving it a review if you like it. It is the next generation of our calendar apps and has a lot of new features we don't have here yet. Currently more resources are going into that application, but we do hope and plan that it's success leads to big updates to Extreme Calendar as well. And let us know if there are things about EC that you would like to see in the Ulti-Planner app.

And as always, good reviews help out tremendously to keep this app improving and the updates coming as well.

Ratings and Reviews

4.2 out of 5
21 Ratings

21 Ratings

Heffer98 ,


Support gets back to you very quickly when you message them. Apples iOS updates may mess up the app but support helps you figure out how to fix it.


Vvikkttorr ,

Even! with limited reminder sounds...

I like everything about this app except for the alerts/alarms/reminders. There's just one sound that goes off. There's nothing that tells what the alert sound is for. I end up having to go in to figure out what the alert sound was for. I have copious alarm and reminder sounds (from various apps) because my mind needs them. The state of the audio notifications doesn't keep me from using this calendar though. I thought it was amazing a few updates ago. And now even with updates it's only gotten better. The customizing capabilities is one of the big things for me since I have to look at every other hour. At one point there were only a few icons to choose from. Now the selection is very workable. You can set up to be reminded at multiple preset times. Make templates. Make lookups of places and people/destinations. It's nice to have different views to choose from. I won't list any more since it's in the app blurb. It is worth the $$ in my opinion.

Disappearing app 1 ,

Sabotaged account

Paid for the app several years ago. Nothing but good things to say about it. Until September 9, 2023. My app suddenly disappeared. Removed from my Apple account. No longer appeared on my phone. Purchased the app again. And all of my calendar events suddenly reappeared. But everything I saved for repeated use was gone. Information I saved for several years. Now had to be re-entered. And at the cost of re-purchasing the app. I am out raged. But who cares right?

App Privacy

The developer, Birdsoft LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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