Does CocoCut｜1s Vlog Diary work on iPhone Duo?

Yes. CocoCut｜1s Vlog Diary is updated for iPhone Duo and uses the full inner display. Its latest version is built with the iOS 27.1 SDK and uses Apple’s iPhone Duo APIs.

Is CocoCut｜1s Vlog Diary letterboxed on iPhone Duo?

No. CocoCut｜1s Vlog Diary fills the inner display.

All apps

CocoCut｜1s Vlog Diary

Name: CocoCut｜1s Vlog Diary
Author: Chengdu Yichen Technology Co., Ltd

Chengdu Yichen Technology Co., LtdUtilities

View in the App Store

On iPhone Duo

Fits

CocoCut｜1s Vlog Diary fills the inner screen and adapts when you fold.

Its latest version is built with the iOS 27.1 SDK and uses Apple’s iPhone Duo APIs.[1]

How we know: From the app’s build
Checked on: Version 2.1.3
Build: iOS 27.1 SDK
uses Apple’s iPhone Duo APIs
Latest version: 2.1.3, Oct 27, 2026
Status updated: Oct 29, 2026

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Version history

Version 2.1.3Fits
iOS 27.1 SDK
Checked Oct 29, 2026

Sources

App Store build, version 2.1.3
Built with the iOS 27.1 SDK. Uses UIView.reservedRegions.
App Store: CocoCut 2.1.3 release notes