Does Fitness First Germany work on iPhone Duo?
Not yet. The latest version of Fitness First Germany we've seen on the App Store (3.1, released August 18, 2026) 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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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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[](https://isitduoready.com/app/fitness-first-germany)
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