For all your plans!

Appointments and to-dos, meetings and deadlines, birthdays and dates - make the most of your time with Calendar 366!
Anything a calendar can do, Calendar 366 can do better - and all functions can be adjusted easily and intuitively.

A dentist appointment is not a friend’s wedding - make your date calendar get the difference.
How often and how exactly do you want to be reminded of what’s important?
Create a calendar that matches your preferences and priorities.

Pick your preferences – year or month, week or day, list or agenda, from light red to dark to darkest blue...

Create your dates by natural text input, for example:
"Meeting tomorrow 10:30-12:00, Melrose Ave /work", or "Sauna! next Sunday 3pm -360", or simply "time to read tomorrow" – any way you like it.
Easily find and change events and reminders, repeat them, add attachments*, and create notes without any hassle.

Sync documents and attachments easily with all devices via iCloud*.
Easily send, accept or decline invitations.
Find a location on the go: simply search, save, and open in Apple or Google maps.
Find your events via Spotlight. Organise your events & to-dos with Calendar Sets...

See all that’s important today with the Calendar 366 Today widget.

Of course, Calendar 366 also works on the Apple Watch - giving you the complete calendar overview directly at the wrist.
Simply use voice input to create new events or reminders.

Calendar 366 II is fully localized in English, German, Spanish, French, Japanese, Italien, Polish and Chinese (Simplified).

• Apple Watch app (iPhone)
• Apple Watch Complications: Modular (Small & Large), Utilitarian (Small, Small Flat & Large) & Circular, Extra Large, Graphic (Corner, Bezel, Circular, Rectangular)
• All events and reminders at a glance
• 8 views, 9 themes
• Spotlight integration
• Calendar Sets
• Custom colors for events and reminders
• Share your events and reminders via Mail, WhatsApp, Messages, Signal etc...
• Key Commands for external keyboards
• Easy, intuitive creation, copying and moving of appointments and reminders by drag & drop
• Easily invite attendees and manage invitations
• No pre-requisites setup (All iOS supported calendar services available: iCloud, Google, Exchange, Outlook, CalDAV)
• Compatible on all Apple devices (iPhone, iPad, Mac)
• Add or modify calendars and lists
• All views optimized for portrait or landscape
• Time zone support
• English, German, French, Japanese, Italien, Polish, Chinese (Simplified)
• Complex repeating rules
• Week numbers
• Complete reminders with a tip
• Super Retina support

Questions and Contact, @nspektorapps,

*Calendar 366 or Calendar 366 II for macOS & iCloud account required

What’s New

Version 1.5.2

*NEW* Custom Colors for events and reminders
*NEW* Theme option "Pure Black"
*NEW* All dialogs themed
*NEW* Sortable Calendar Sets
*NEW* Traditional Chinese

--- New in Calendar 366 v1.5.2 ---
• March bug fixed
• Location company search fixed
• Title formatting fixed
• Minor bug-fixes

Ratings and Reviews

4.6 out of 5
78 Ratings
78 Ratings
Manic Bobo ,


Like the others said...solid start. There were a few hick-ups along the way, but the developer was quick to respond, and locate, and put out an update with a fix. That’s always a plus, and often a rare event. This is a nice simple calendar that’s easy to read and easy to use. The new agenda view is great. I like the month view best. Having both calendars AND reminders on one calendar is perfect for me. The way the app is set up it’s fast & easy to switch between whatever views you want. I like the slider side panel to change your view.
⌚️On the Apple watch I totally love this calendar. It loads pretty fast on my series 1 watch, and any changes made to this calendar on the phone show up fairly quickly on the watch, actually it’s a lot faster all around than other calendars I’ve tried on the watch that may not update for an hour or more. The first screen shows just the current month (a six weeks view) with only today highlighted. Swipe to the next screen and get your calendar events & reminders listed by days. Swipe to the next screen and get your reminders by the list they are in. Well thought out for the watch.
💰It’s a calendar app you won’t regret having bought an hour later. Plus, no idiotic subscription fees. Well worth the money.

tipsyshoes ,

What a fantastic developer!

With this latest update the developer has provided enhanced capabilities and even a few fixes. This is an excellent example of a developer listening to customer feedback and then coming through. For my money Calendar 366 is the best choice. Highly recommended.

Old review: Yes, Calendar 366 is genuinely a fine agenda and reminder app. However, this is eclipsed by the developer’s dedication to the customer. When I reported a problem with the location search feature the developer listened, agreed that there was indeed a bug and produced a fix in less than forty-eight hours! Now Calendar 366 is feature packed and flawlessly executed. Highly recommended without hesitation.

PrincessMassacre ,

It’s perfect

It’s got natural language entry that supports time, location, a calendar picker and priority. Cause ain’t nobody got time for half-hearted natural language input. This app supports reminders beautifully and they have natural language entry as well. That’s another way this app is a winner. I love weekly views and the ones in this app are perfect after an older update they made. Developers are responsive to emails as well. Ignore anyone who says this app isn’t worth it or is hard use. It’s basically Informant 5 at a realistic price for the average person who doesn’t spend hours googling how to use a $25 app. Buy it and you won’t regret it. This app is very underrated for all the value it provides.


Vincent Miethe
47.8 MB
Requires iOS 9.3 or later. Compatible with iPhone, iPad, and iPod touch.
English, French, German, Italian, Japanese, Polish, Simplified Chinese, Spanish, Traditional Chinese
Age Rating
Rated 4+
© 2017-2019 n.spektor


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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