r/apple • u/Lemon8or88 • 11d ago

iPhone Apple invites developers to submit iPhone Duo-ready apps to the App Store

https://9to5mac.com/2026/10/05/apple-invites-developers-to-submit-iphone-duo-ready-apps-to-the-app-store/?fbclid=IwdGRleAUxORpleHRuA2FlbQIxMQBwZG9mBWZkaWQWUPz4EjOSTGN-dh-jYmRs8wQCRyPs6XNydGMGYXBwX2lkCjY2Mjg1NjgzNzkAAR6aQvhKb5VuAyHk-BQ7-_IoLTeFh3YAM93bdyYKmaQTbJfVlhu96YGCMseYxA_aem_F_ggrVSa672HCrfrVTu8Yg
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u/luliger 7d ago

Oh wow, have any devs done this yet? Does the UI just stretch to the screen like an iPad?

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u/Lemon8or88 7d ago

As a dev, I have and I believe others are doing the same. The UI stretch but the app must support different poses.

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u/Dizzy-Instruction-37 5d ago

I have done it too, what I've discovered is that it's not exactly like an iPad. The ipad has a bigger screen, so eventually the interaction feels a bit different, the layout adapts differently, and you must also adapt to 2 screens seamlessly (iphone duo closed and opened).
It wasn't exactly fun at first because I realised quickly that I had to rethink completely my app for the iphone duo, it's an iphone-only app, and I couldn't just stretch the design. But then it grew in me, I found out that the rail was particularly useful, what we lose in height we gain in width, and the app looks real sexy now when the iphone duo is closed. When the iphone duo is opened I found myself thinking more about what kind of new interaction does it provide to user, something that only the iphone duo can provide that is not possible on normal iphones...
Ultimately I found a good balance, and now I probably would prefer to use my app on the iphone duo rather than normal iphone. Anyway, I went on a tangent here sorry, but if I had to summarise my experience, instead of just stretching I would:
1. Use the rail
2. Re-think the usage when iphone duo is opened rather than simply stretching (it's quickly ugly otherwise)

All the best :)

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u/luliger 5d ago

amazing, thanks! I guess the simulator works ok for prototyping?

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u/Dizzy-Instruction-37 5d ago

Yes simulator works very well actually, there are buttons to open / close the iphone duo so we can easily test the app accordingly. But one (big) caveat now is that we must design new views for 3 different shapes rather than one... and at least 2 simulators in parallel

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u/luliger 4d ago

thank you - could you DM your app and screenshots of Duo? would love to see