Calendar Sync

Contains adsIn-app purchases
Content rating
Everyone
10+
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Content rating
Everyone
In-App Purchases
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About this app

Work schedules in Outlook, personal appointments in Google Calendar, and family schedules in iCloud.

If your calendars are scattered, you are bound to miss one.

Calendar Sync aligns your scattered calendars. It automatically synchronizes at set intervals, even if you don't keep the app open.

■ Services You Can Connect

• Google Calendar

• Microsoft Outlook / Microsoft 365

• Apple iCloud

• Naver Calendar

• Naver Works (Import only)

• Dooray!

• Android calendars saved on this phone

Google and Microsoft connect to the official login screen. You do not need to enter a password into the app.

■ Choose Your Direction

• Unidirectional — Sends events from Calendar A to Calendar B. Whatever happens in B remains in A.

• Bidirectional — Aligns events created and modified on both sides. Even when the same event is modified on both sides, it compares with the original to identify what has changed.

You can use a single account for multiple policies. You can mix and match: Unidirectional for work schedules to personal calendars, and bidirectional for two personal calendars. ■ Only the Calendars You Need

Even if you have multiple calendars in your account, only the ones you select will be synchronized. Team shared calendars or subscribed holiday calendars will not be included.

■ Battery-Friendly Automatic Synchronization

You can set conditions for automatic synchronization.

• Only when connected to Wi-Fi

• Only when charging

• Skip if battery is low

You will be notified if synchronization fails.

You won't have to wait until later to find out about it.

■ A History Is Preserved

The app records when, what, how many, and how much were created, changed, or deleted.

You can also export this as a file.

■ Privacy

This app does not have a developer server. Schedules are exchanged only with the calendar service connected to the user and are not sent to the developer.

Login information and credentials are encrypted using the Android Keystore and stored only on this phone; they are excluded from cloud backups and cross-device transfers.

Deleting an account deletes its credentials and cache along with it.

■ Other

• Korean · English

• Light · Dark screen modes

• A feature to clean up calendars incorrectly filled by syncing all at once

■ Things to Note

• Naver Works does not support external writing to the server, so it only allows importing.

• Apple iCloud requires an app-specific password instead of your Apple ID password, in accordance with the method set by Apple. Instructions on how to obtain this password are provided within the app.

• Schedules that have already been synced remain in each calendar service even if you delete the app. To revert them, please clean them up using 'Delete Calendar Events' before deleting the app.

• Accounts issued by a company may not connect if the administrator has blocked external app connections.

■ Ads and Purchases

You can use all features for free, and ads are displayed. If you wish to use the app without ads, you can make a one-time payment within the app. This is not a recurring payment.

Inquiries: capian577@gmail.com
Consolidate scattered calendars into one. It automatically synchronizes various schedules from Google, Outlook, iCloud, Naver, Doorae, and more.
Updated on
Oct 9, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Calendar and Device or other IDs
  • This app may collect these data types
    Personal info, Calendar, and Device or other IDs
  • Data is encrypted in transit
  • Data can’t be deleted

What’s new

흩어진 캘린더를 하나로 맞춰 주는 첫 정식 버전입니다.
- Google, Outlook, iCloud, Naver, NAVER WORKS, Dooray, 기기 캘린더를 연결합니다.
- 두 캘린더를 고르고 양방향·미러·업데이트 중에서 방식을 정하면 됩니다.
- 자동 동기화 주기, 동기화 기간, 삭제 한도를 정책마다 따로 설정합니다.
- 일정 데이터는 기기 안에서만 처리되며 개발자 서버로 전송되지 않습니다.
Content rating
Everyone
In-App Purchases
Learn more

App support

About the developer
칠공팔팔
capian577@gmail.com
대한민국 서울특별시 마포구 마포구 성미산로5길 7, 301호(성산동,청구빌라) 03971
+82 10-4338-3489