Is it Duo-ready?

CHRONO TRIGGER (Upgrade Ver.)

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Does CHRONO TRIGGER (Upgrade Ver.) work on iPhone Duo?

Not yet. The latest version of CHRONO TRIGGER (Upgrade Ver.) we've seen on the App Store (2.1.1, released July 24, 2023) came out before Apple started accepting iOS 27.1 SDK builds on October 5, 2026, so it isn't built for the full iPhone Duo display. Depending on how it was built, it either fills most of the inner display or opens in a smaller window with empty space around it.

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By position

Outer screenNo data
Inner screenNo data
Half-folded (tabletop)No data
Keeps your place when foldingNo data

From recent reports. “Didn't try” answers aren't counted.

App Store updates

All apps
Version 2.1.1

Checked every few hours. Only builds made with the iOS 27.1 SDK, accepted since October 5, 2026, can use the whole inner display. Owner reports confirm whether an update did.

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Positions you tried

Outer screen
Inner screen
Half-folded (tabletop)
Keeps your place when folding

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iPhone Duo status of CHRONO TRIGGER (Upgrade Ver.)
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