Does NS work on iPhone Duo?

Yes. NS Reizigers B.V. added iPhone Duo support in version 8.56.1 (21 October 2026): Nieuw: ondersteuning voor de iPhone Duo, inclusief het gebruik van de app op het grotere scherm.

See it on the App Store
On iPhone Duo
Adapted
Developer
NS Reizigers B.V.
Category
Travel
Current version
8.56.1 · 21 October 2026
App Store rating
4.6 out of 5 (161,411 ratings)
Last checked

How we know

Apple or the developer says the app is built for iPhone Duo's inner screen. See it on the App Store

History on iPhone Duo

Other Travel apps on iPhone Duo

All apps on iPhone Duo in Spain →

Got an iPhone Duo? How does NS look on the inner screen?

No owner report yet for version 8.56.1.

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Good to know

Does NS work on iPhone Duo?

Yes. NS Reizigers B.V. added iPhone Duo support in version 8.56.1 (21 October 2026): “Nieuw: ondersteuning voor de iPhone Duo, inclusief het gebruik van de app op het grotere scherm.”

Why do some apps have black bars on iPhone Duo?

Because they were built before Apple's iPhone Duo tools. On the inner screen, an app built for an older iOS opens in an iPhone-size window on a black background; one built for iOS 27.0 uses more of it but leaves some space blank; only apps built with the iOS 27.1 SDK, which developers have had since 5 October 2026, use the whole display.

Do apps that aren't adapted still work on iPhone Duo?

Yes. Every iPhone app runs on iPhone Duo: one that isn't adapted just doesn't fill the inner screen until its developer updates it.

How we measure

Sources: Apple's list of apps adapted to iPhone Duo (22 October 2026) and each app's App Store record (version, release date, release notes, description). Apple doesn't say which tools an app was built with, so an app stays “Updated, unconfirmed” until its developer says more.