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App Store Apps > Utilities > CalCs - Calendar Complications
CalCs - Calendar Complications icon

CalCs - Calendar Complications

2.1
Akihiro Usui
4.62
13 reviews
$0.49

View on the App Store

AppBrain's verdict

Top 10
Rating on App Store
4.62
13 ratings
Last updated
November 8, 2026
Size
4.46 MB

It doesn't have enough ratings yet to judge what users think. Its best ranking is #8 in Top Paid, Utilities in Japan.

Official page on the App Store

User feedback

Ratings and reviews on the App Store

Comments on CalCs - Calendar Complications for iOS

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Store listing

By Akihiro Usui, from the App Store
Description by Akihiro Usui Written by the developer, not by AppBrain. Click to read.
CalCs (short for "Calendar Complications") is a watchOS-only app that provides a variety of calendar-related complications for Apple Watch.

--Important Notes--
The main app is designed to list events and reminders and display a monthly calendar. Other features are available through complications and the Smart Stack.

●Re-downloading CalCs
If you download CalCs from the iPhone App Store, synchronization issues may prevent it from appearing on your Apple Watch.
According to Apple's specifications, watchOS-only apps cannot be re-downloaded from the App Store on an iPhone. To re-download CalCs, use the App Store on your Apple Watch:
・Scroll to the bottom → "Account" → "Purchased" → "CalCs" → re-download

--Key Features--

●A variety of complications
・Date: Displays the current date in various formats.
・Events and reminders: Displays events and reminders synced with your iPhone. You can choose whether to include all-day events.
・Monthly calendar: Displays a monthly calendar in various formats. You can choose to start the week on Monday. Holidays are supported in some regions.
*Holiday data is provided by external APIs and may be incomplete.
*Only Apple Watch models that support the Modular Duo face (Series 7 or later, excluding SE models) can display a monthly calendar across two large rectangular slots. Other models display it in one slot with a smaller font.

●Events, reminders, and monthly calendar in the main app
Tap a complication to open CalCs and view a list of events and reminders synced with your iPhone, as well as a monthly calendar.
*Only incomplete reminders are displayed.
*CalCs cannot currently add, edit, or delete events or reminders, or mark reminders as complete.

●Simple settings
To keep settings easy to use on the small Apple Watch screen, the only available settings are for choosing which calendars and reminder lists to display.

--Notes--

・CalCs complications use features introduced in watchOS 26. The following models are not supported:
- Apple Watch Series 5 and earlier
- Apple Watch SE (1st generation)
(Other models that have not been updated to watchOS 26 or later are also unsupported.)

・Due to watchOS limitations on complication updates, changes may not appear immediately when the date changes or when events or reminders are added or edited on your iPhone.

・After adding a complication for the first time, it may take some time to appear.

・If a complication does not update, tap it to open CalCs. This may refresh the data.

・If complications still do not update after opening CalCs, try the following:
1. Restart both your iPhone and Apple Watch.
2. Force-quit CalCs:
① With CalCs open, press and hold the side button.
② When the emergency call and power-off screen appears, press and hold the Digital Crown.
3. Reinstall CalCs:
① Press the Digital Crown to show the app list.
② Touch and hold CalCs, then tap the × button to delete it.
③ Open the App Store on your Apple Watch.
④ Scroll to the bottom → "Account" → "Purchased" → "CalCs" → re-download.

・If events are missing from the main app's list or complications, CalCs may not have full calendar access. To reset the permission:
① On your iPhone, open Settings → Privacy & Security → Calendars.
② Set CalCs' access to "None", then select "Add Events Only".
③ Open CalCs. When prompted, tap "Allow Full Access".

Safety and technology

Found in the app by AppBrain
Price
$0.49
App size
4.46 MB
Content rating
Everyone

Technologies used by CalCs - Calendar Complications

Releases

Updates seen on the App Store
Version
2.1
Launched
April 2024

No changelog data

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Rankings

App Store top charts
Highest rank
#8
Chart
Top Paid
Utilities
Country
Japan

App Store Rankings for CalCs - Calendar Complications

Top rankings

Rank Country Category List
8 Japan Utilities Top Paid
36 South Korea Utilities Top Paid

Ranking history in Japan

About the app and developer

About CalCs - Calendar Complications

CalCs - Calendar Complications is an utilities app developed by Akihiro Usui.

User Ratings

CalCs - Calendar Complications is rated 4.62 out of 5 stars. The rating is based on 13 ratings.

App Information

CalCs - Calendar Complications costs $0.49. The app size is 4.46 MB. The latest version available is 2.1. The last update was on November 8, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since April 2024.

CalCs - Calendar Complications is made and published by Akihiro Usui. AppBrain is an independent app data site and isn't affiliated with Akihiro Usui. The app name, icon and description belong to Akihiro Usui and are shown as published on the App Store.

Developer information for Akihiro Usui

Akihiro Usui

Address:

Frequently asked questions about CalCs - Calendar Complications

Is CalCs - Calendar Complications free?

No. CalCs - Calendar Complications costs $0.49 on the App Store.

Is CalCs - Calendar Complications still available?

Yes. CalCs - Calendar Complications is on the App Store, and the last update we saw was on November 8, 2026.

How large is CalCs - Calendar Complications?

CalCs - Calendar Complications is 4.46 MB.

Is CalCs - Calendar Complications suitable for children?

App Store rates the content of CalCs - Calendar Complications as suitable for everyone.

How do people rate CalCs - Calendar Complications?

CalCs - Calendar Complications scores 4.62 out of 5 stars, from 13 ratings on the App Store.

Who made CalCs - Calendar Complications?

CalCs - Calendar Complications was developed by Akihiro Usui. It is listed in the utilities category on the App Store.

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