Calendar Op.2: Planner & Diary
Plan appointments and keep a diary with month, list and split calendar views.
Yoshihiro Sakamoto · Productivity · Free
iPhone screenshots
How it uses iPhone Duo
On Duo, the month and list appear side by side with an adjustable divider; half-folding aligns that divider with the crease.
What’s New
Version 3.0.1 ·
V3.0.1 fixes - Minor bug fixes for iOS 27.1. What was new in V3.0 Full support for iPhone Duo - On the large inner display, use Split View with the month and the list side by side, just like on iPad. Drag the divider to adjust the panes. - On the folded outer display, the app works with its usual iPhone layout, and switches automatically as you open and close the device. - When the device is half open, the Split View divider moves to the fold by itself. - Support for the new vertical bar in iOS 27.1: depending on orientation and posture, the buttons move to a column at the side of the screen. iOS 27.1 support - The whole app has been tuned for the latest iOS 27.1. Refreshed for the Liquid Glass design - The buttons in the top and bottom bars are now Liquid Glass buttons. Month, Split and List form one group, with the current view shown as a blue circle. - The day pop-up header has been refined: the weekday is shown in a lighter colour, with Sunday in red and Saturday in blue, and the + and × buttons are now round glass buttons. Thank you for using Calendar Op.2!
App Store descriptionWritten by the developer.
Calendar Op.2 [opus two] is a very simple and easy-to-use calendar application designed for everyone who loves simple life. With its clean user interface and carefully selected feature set, you can organize your daily schedule smoother than ever. FEATURES: ● Works with built-in iOS calendar. ● Beautiful month & list view with event title. ● Mini pop-up window for daily events. ● Seamless vertical scrolling to the previous and next month. ● Copy & Paste for events. ● Incremental search view. ● Syncing with iCloud, Google Calendar, etc. via built-in iOS calendar.
Calendar Op.2: Planner & Diary on iPhone Duo: FAQ
Is Calendar Op.2: Planner & Diary optimized for iPhone Duo?
Yes. Calendar Op.2: Planner & Diary is Built for Duo: it uses the fold, Split View or the outer display. Verified on October 29, 2026 (Developer statement).
What does Calendar Op.2: Planner & Diary look like on iPhone Duo?
On Duo, the month and list appear side by side with an adjustable divider; half-folding aligns that divider with the crease.
How much does Calendar Op.2: Planner & Diary cost?
Calendar Op.2: Planner & Diary is free to download on the App Store.
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