This is great!
My only wish is that it could run in the background and keep it synchronized instead of needing to choose each event individually.

Archived App (Last seen on 3 Mar 2026)
This is an archived listing of the app previously available on the App Store.This tool helps users with multiple calendars keep their private events synchronized between their iPhone and Outlook. It can copy events from personal or shared calendars to Outlook, and transfer all events from Outlook back to personal/shared calendars.
2.6
March 7, 2022
Update on latest IOS 15.0
Calendar Synchronization is a tool designed to transfer calendar entries between your iPhone and Outlook. It's particularly useful for users who have multiple calendars and want to maintain consistency between them.
Since the 'private' flag isn't directly accessible on iPhone calendars, Calendar Synchronization adds the text 'PRIVATE' to the notes field of private events. Only events with this marker in their notes will be visible.
Calendar Synchronization is a paid application, priced at $0.99. This one-time purchase grants you access to its synchronization features.
Calendar Synchronization is available for iPhone and iPod Touch devices. It is designed to work seamlessly with Apple's iOS ecosystem.
The app was last updated on March 7, 2022, with version 2.6. While specific update frequency isn't detailed, this indicates ongoing maintenance and potential improvements.
No, Calendar Synchronization is ad-free. The application does not contain any advertisements, providing an uninterrupted user experience.
Calendar Synchronization has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.
Events are selected for synchronization from the current date until the end of the next year. This ensures a broad yet manageable scope for your calendar data.