Does Yahoo Finance work on iPhone Duo?

Yes. Yahoo Finance 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 Yahoo Finance letterboxed on iPhone Duo?

No. Yahoo Finance fills the inner display.

All apps

Yahoo Finance

Name: Yahoo Finance: Stocks, Markets
Author: Yahoo

YahooFinance

View in the App Store

On iPhone Duo

Fits

Yahoo Finance 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 26.21.0
Build: iOS 27.1 SDK
uses Apple’s iPhone Duo APIs
Latest version: 26.21.0, Oct 21, 2026
Status updated: Oct 22, 2026

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Version history

Version 26.21.0Fits
iOS 27.1 SDK
Checked Oct 22, 2026

Sources

App Store build, version 26.21.0
Built with the iOS 27.1 SDK. Uses UIHingeInteraction and SwiftUI’s ArrangementView, OverlayArrangementViewStyle, reservedRegions, onHingeChange and toolbarVerticalEdge.