# Extreme Calendar — Family & Work Agenda Planner

> Advanced iOS calendar with flexible views and quick event management. (iPhone/iPad app by Birdsoft LLC.)

- Source: https://appshunter.io/ios/app/extreme-calendar/id431771565 (this page in markdown: same URL + `.md`)
- Developer: [Birdsoft LLC](https://appshunter.io/developer/293366061)
- Category: Business, Productivity
- Price: $7.99 with in-app purchases
- Rating: 4.30/5 from 24 App Store ratings · 115 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 30 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, European Portuguese, European Spanish
- Released: 2011-04-29
- Data updated: 2026-08-30
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/extreme-calendar/id431771565/reviews.md

## What is Extreme Calendar?

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.

------------------------------------- 

Interface 

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!

## Key features

- Advanced calendar views (Year, Month, Week, Day, Agenda)
- Birthdays and Anniversaries from contacts
- Advanced repeating event options
- Move/Copy Events
- Natural Language Entry
- Event Templates
- Syncs with native calendar data

## Pricing and in-app purchases

Base price: $7.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Extreme Agenda | $3.99 | one-time |


## What do users think of Extreme Calendar?

Overall sentiment: mixed

**Pros**

- 👍 Intuitive and user-friendly interface
- 📅 Multiple view options (day, week, month, agenda)
- 🎨 Customizable icons and visual organization
- 🔄 Reliable syncing across devices
- ⏰ Multiple reminder/alarm options
- 📋 Template creation for recurring events
- 🏷️ Category and color-coding support
- 📊 Comprehensive event details and customization
- 💾 Cloud synchronization capability
- 🎯 Flexible recurring event options
- ⚡ Fast customer support response

**Cons**

- 🐛 Frequent app crashes and instability
- ⚠️ Data loss and disappearing events
- 🔄 Syncing issues between devices
- ⏱️ Slow app performance and loading times
- 🎨 Limited icon selection in free version
- 📱 Bouncy/glitchy event creation window
- 🔧 Clunky navigation and interface
- ❌ Unreliable notification handling
- 💰 Expensive upgrade pricing
- 🎯 Difficulty finding features in menus
- 📝 Small text display in month view

**Commonly reported bugs**

- App crashes on launch or during use
- Events disappearing without explanation
- Bouncy event creation window causing data loss
- Syncing failures between iPhone and iPad
- App becomes unresponsive with large contact lists
- Notifications interrupt and reset event creation
- Recurring events not functioning properly
- Cannot delete certain categories
- Appointments not saving
- Deleted items still appearing in calendar
- Swipe navigation not working reliably
- Copy/paste functionality slow and unreliable
- App crashes when trying to edit recurring events
- Categories not syncing across devices
- Blank screen on iPad

**Most requested features**

- More diverse icon options
- Better alarm/reminder sound variety
- Ability to display notes in monthly view
- Drag-and-drop appointment editing
- Double-tap to create appointments
- Larger icon display options
- Geographic data integration for addresses
- Contact integration with events
- Last occurrence of month recurring option (e.g., last Wednesday)
- Alphabetizable/sortable menus
- UK date format support
- Two-month detailed view option
- Auto-scroll to current time in daily view
- More color options
- Picture/photo support in notes

## Recent user reviews (10 of 115)

All indexed reviews: https://appshunter.io/ios/app/extreme-calendar/id431771565/reviews.md

### 1/5 — Sabotaged account

*2023-09-13*

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?

**Developer response:** Hi, Did you really think this is something we did? 

I actually think you probably switched your Apple account, as you would not have been charged again by Apple on the same account, Apple is in control of all that. Or you switched between one of our other Extreme titles that you had updated. 

Sorry this happened to you, but I do not remember hearing from you on our technical support email to try to help.

### 3/5 — Disappearing Event Issue

*2023-08-12*

I never responded to the last Birdsoft developer response (thank you for that!), so I thought that I should finish off before any next steps. 😌

I took your points and appreciated almost all of them, although I do not know that it is fair to speak of my expectations for “all” apps. I just know that when I buy one I want it to continue to work. That is just the nature of being a client or consumer, and understandably so. However, I did understand what you were trying to convey. • I expect that you did send out the app update that you mentioned, but the version of Extreme Agenda I was using was the add-on that I purchased through Extreme Week (purple icon). So I did not receive an update there. • Anyway, since I really like that product I am happy to try out the Ultiplanner (sp?) and possibly purchase it. I just hope that this new app will allow me the same ability to display my engagements as icons (instead of words), and that the “Categories” will also sync across all my iOS devices along with the other data (which Extreme Planner just never did somehow). Looking forward to the experience!

••••••••••••
3/1/23
There is an ongoing glitch with this calendar that occurs while you have a window open and are configuring an event for the first time (so it is not saved yet). Although the original version of this app did not have this issue, the window that opens when you are creating a new event is quite “bouncy.” By this I mean that the entire date configuration window display can be pulled downwards just by touching the screen and dragging your finger downwards a bit. Then when you let go, the window pops back up to the top of the screen like a rubber band. In the process, anything you entered into that window almost invariably gets erased and you are left with an empty default window. It is as if you had just opened a new event window and had not worked on it yet. So you have to create your event again from scratch. This is a problem not because you are going to intentionally pull downwards on the window while you work, but because it is so easy to do so accidentally. So you have to be so careful about how you touch the screen now and this is like tiptoeing with your fingers. As a user, this is uncomfortable and unnatural. • It occurs to me that perhaps this is what some users were referring to when they mentioned “disappearing events” in their reviews of this product. • I should note that this issue did appear to be fixed at some point two years ago but the problem returned again after a week or two. I just never said anything about it until now.

**Developer response:** Thanks again for explaining the glitch, watch for it to be fixed in version 5.20 coming out very soon. Apple created that glitch by defaulting all screens to act in that way by default, thus changing how existing apps worked, which was not a great decision...

### 3/5 — Disappearing Event Issue

*2023-03-01*

There is an ongoing glitch with this calendar that occurs while you have a window open and are configuring an event for the first time (so it is not saved yet). Although the original version of this app did not have this issue, the window that opens when you are creating a new event is quite “bouncy.” By this I mean that the entire date configuration window display can be pulled downwards just by touching the screen and dragging your finger downwards a bit. Then when you let go, the window pops back up to the top of the screen like a rubber band. In the process, anything you entered into that window almost invariably gets erased and you are left with an empty default window. It is as if you had just opened a new event window and had not worked on it yet. So you have to create your event again from scratch. This is a problem not because you are going to intentionally pull downwards on the window while you work, but because it is so easy to do so accidentally. So you have to be so careful about how you touch the screen now and this is like tiptoeing with your fingers. As a user, this is uncomfortable and unnatural. • It occurs to me that perhaps this is what some users were referring to when they mentioned “disappearing events” in their reviews of this product. • I should note that this issue did appear to be fixed at some point two years ago but the problem returned again after a week or two. I just never said anything about it until now.

**Developer response:** Thanks again for explaining the glitch, watch for it to be fixed in version 5.20 coming out very soon. Apple created that glitch by defaulting all screens to act in that way by default, thus changing how existing apps worked, which was not a great decision...

### 4/5 — Latest Update Is A Big Improvement! 🎉

*2021-03-06, version 5.15*

(6 March 2021):  For the past year it has been really difficult to use the calendar, as it was unstable, and events got erased easily & unexpectedly. However, since the latest update, the app has been stabilized and greatly improved. You no longer need to be super careful and delicate when swiping through icons & options and setting up events. What a relief! 😅

I notice two remaining issues:

• The “...” section at the top of the screen, that used to take you to “Settings,” where you could create or remove categories, has disappeared. So not only can you not alter your categories, when you try to set up your color coding, the only choice it gives you is “Calendar.” The “Categories” section appears to be gone so you cannot set up your calendar display using categories (my preferred mode of display).

•  The “Subject” Window, still lacks the + and - buttons that used to allow you to remove or make an entry to a list of events that you created (so that you could tap on one and quickly enter a subject for your event). I hope this is restored soon.

In the meantime, thanks for fixing the rest!

### 3/5 — Update!!

*2021-01-16*

Kalender stürzt ab, Februar 2021 lässt sich nicht öffnet. 
Bitte um ein Update!!!

### 4/5 — Support

*2019-09-27*

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. 

Thx

### 1/5 — Leider sehr altbacken

*2019-01-18*

Sorry, der Kalender sieht für mich sehr altbacken und nicht gut aus. 
Was gar nicht geht ist, das bei der Eingabe der Adresse des Termins nicht auf geographische Daten zurück gegriffen wird.

### 5/5 — Dies when used

*2018-06-12*

First my calendar wouldn’t work on my iPad; it would blank out, then it started doing it on my iPhone 8! WTH!

**Developer response:** We are looking into this, we weren't seeing this in beta testing but now have a couple ways to reproduce, so hopefully a fix is coming soon.

### 5/5 — Even! with limited reminder sounds...

*2017-05-02*

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.

### 2/5 — Not Recommended

*2017-02-04*

This all-in-one app (after in app purchase) is feature rich and allows under the hood customizations. The layout is professional and visually appealing. It includes a calendar, reminders, lists, contacts, and notes (limited).

Update: after multiple attempts to contact the developer were unsuccessful (app will not sync), this app has been downgraded to two stars. I'm now back to using Note HD (A note) which I recommend.

## Frequently asked questions about Extreme Calendar

### What does Extreme Calendar do?

Extreme Calendar is a powerful calendar application for iOS designed for speed and flexibility. It offers advanced views like Year, Month, Week, Upcoming Agenda, and Day, allowing users to see a lot of information at a glance and add events quickly.

### What are the key features of Extreme Calendar?

Key features include powerful calendar views, pulling birthdays and anniversaries from contacts, advanced repeating event options, the ability to move/copy events, natural language entry, event templates, and synchronization with your native calendar data (Google, iCloud, Exchange).

### How much does Extreme Calendar cost?

The app is available for free with in-app purchases. Users can purchase additional features to upgrade to the full Extreme Agenda Planner, which includes contact, task, note, and list views, along with enhanced search and filtering capabilities.

### What devices is Extreme Calendar compatible with?

The app offers Universal Support and is designed to work on various iOS devices. It supports Retina and iPhone 5 displays, as well as Portrait and Landscape orientations.

### What are common use cases for Extreme Calendar?

Common use cases include managing family events and appointments, organizing work schedules and deadlines, tracking birthdays and anniversaries, and planning daily or weekly activities with its flexible event management tools.

## Version history (last 5 releases)

### 5.28 — 2024-02-03

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.

### 5.27 — 2024-01-31

Updates for iOS 17 access.

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.

### 5.25 — 2023-09-26

Updates for iOS 17 access and 24 hour time.

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.

### 5.24 — 2023-05-25

Small fixes to the big 5.20 update that added a new Weather sources and big fixes to how modern screen devices work.

Please help support Birdsoft by checking out our new Ulti-Planner calendar app and maybe giving it a review if you like it.  It 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.

This is a big update internally for Extreme Calendar, especially in how the views work. If you see any issues that we missed please drop us an email as we are planning a follow up update to fix anything that may be found.

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

### 5.22 — 2023-05-18

New weather source and many fixes for modern devices.

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## More apps by Birdsoft LLC

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All apps by Birdsoft LLC: https://appshunter.io/developer/293366061

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-30.*