Comment by djtriptych
15 hours ago
App rejiggering is not an exact science, and is often poorly done.
Even if apps transition well between aspect ratio / screen size breakpoints, there is a cognitive load to maintain 2+ UI configurations.
Preserving aspect ratios eliminates these issues. It'll make every app better.
^^This.
Despite all the responsive design tools and declarative layouts to ensure a great layout even on an oddball resolution... the fact is that in practice it's nontrivial, and remember that the companies that make most of the apps you use have finite design and QA budgets. They need to actually use the resolution in question in order to really do a good job of designing for it, and giving them double the work, for a $2000 and up phone which probably won't be super highly adopted, is a recipe for getting apps that end up with layouts that aren't optimized properly on one (or both) of the screen sizes.
My point is largely that the nontrivial work you've described is the norm today. What's being asked for tomorrow is not new. Most apps are already set. Not just because of work Apple does to make it easier for apps to "port" out of the box, but because the multiple sizes that apps are already prepared to handle across iPhones, iPads, and resizeable iPad apps (and to the extent that devs are having React Native handle this, then across Android too).
So it's a lot of work, yes, but it's work that's already been done and that engineering teams already assume in their processes. The future is the same because this has been the status quo for a few years. Whether the Duo has a 2:1 ratio or something slightly different, the apps are at about the same readiness for it.
This is already something every app needs to deal with on iPad, where users can arbitrarily resize apps and windows. And apps that support landscape layout on phones have always needed to support their UI being rendered in different aspect ratios.
At WWDC this year, Apple introduced a tool[0] to let developers arbitrarily resize their simulated iOS device screens.
Flexibility and adaptivity are more front-and-center for iOS devs than ever.
[0]https://developer.apple.com/documentation/xcode/configuring-...
I agree it will feel super nice to go from the front screen to the dual screen and have nothing "move". And similarly it will feel "mildly infuriating" if it doesn't do that.
I also think that I (personally) don't need a front screen and would love to have whatever cost savings or improvements would come if there weren't one. This last sentence is of course a me thing, but I mention it because I think that if people start on the front screen and then open the Duo, they may just want the full screen app or something else entirely. I'm not sure the use case of being in your banking app device folded, deciding midway through flow to open it, and wanting to be in the same UI is really what I want. The part I question is what's going on that step 2 came about—I think it's either you want to go into more depth on it or you're just opening the device the way you would had you not been in your banking app.
The case where I open it to find the app using half the screen and then I have to press something or drag something to make it full screen is not that great (and isn't great today with current iPad window resizing). The best case I can think of for wanting the app in the same size format when I open it is for is something like multitasking, I guess we'll see how that looks or feels and how you get the second app open (or whether it's very common use case anyway).
In general, I've long felt the folding tech is for tablet use cases not for phone use cases. I think Apple's foray (finally) into it more or less validates that. Even though there will be a meaningful number of people buying it to replace their phone, I think this is largely because their phone use is already tablet use case-y (for entertainment especially). I assume many people will also buy it as a(n expensive) tablet replacement in addition to their phone, which is perhaps related to the timing of iPhone Handoff (same SIM on two phones) too.