A clean month, week and day calendar, now supporting the Duo
Does Calenn work on iPhone Duo?
According to its developer, yes. FoldHunt's editor hasn't checked Calenn on iPhone Duo yet, so it's listed as a claim.
- Developer claimedThe developer, in the release notes for version 27.2.0 (released October 10, 2026): "Added support for iPhone Duo." The notes say nothing more. There are no pictures of it on the Duo yet. The App Store seller is Koya Hirose (id 6746424742).
Adapted for the fold
We're waiting on details of exactly what Calenn changes for the fold. Are you the developer? Tell us.
About Calenn
Calenn is a Japanese calendar app with month, week, day and list views, Google and iCloud sync, drag-and-drop editing and widgets. Version 27.2.0 supports iPhone Duo, the release notes say, without describing the layout. There are no pictures of it on the Duo yet.
Related guides
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Every iPhone app opens on iPhone Duo, but only updated ones fill the inner display. What an app looks like before its developer adapts it, how to tell which are ready, and which popular apps have said so.
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Sources: Calenn | Calendar at a Glance on the App Store (apps.apple.com)
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