Does Octal for Hacker News work on iPhone Duo?

Yes. Octal for Hacker News 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 Octal for Hacker News letterboxed on iPhone Duo?

No. Octal for Hacker News fills the inner display.

All apps

Octal for Hacker News

Name: Octal for Hacker News
Author: Daniel Wu

Daniel WuNews

View in the App Store

On iPhone Duo

Fits

Octal for Hacker News 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 5.3.0
Build: iOS 27.1 SDK
uses Apple’s iPhone Duo APIs
Latest version: 5.3.0, Oct 20, 2026
Status updated: Oct 23, 2026

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Version history

Version 5.3.0Fits
iOS 27.1 SDK
Checked Oct 23, 2026

Sources

App Store build, version 5.3.0
Built with the iOS 27.1 SDK. Uses UIHingeInteraction.