Why the ‘4.6 Inch iPhone Screen’ Rumors Are Wrong

COMMENTARY | An “unnamed industry source” told South Korea’s Maeil Business Newspaper that Apple‘s making a new iPhone with a screen 4.6 inches across, according to Reuters’ Miyoung Kim. The current iPhone has a 3.5 inch screen; a 4.6 inch screen would place it in the realm of Android “superphones” like the Droid series.

As “Year2” notes on The Verge’s forums, the “kernel of truth” here is that South Korea-based Samsung probably built the iPad 3’s Retina Display, according to iFixit’s teardown. That would place the industry source in the right country, at least. There are some huge problems with the idea of a super-sized iPhone, however, not limited to the following.

It’d require all-new app designs

The current iPhones have a Retina Display, like the latest-generation iPad. And in order to be a Retina Display (a term trademarked by Apple), a smartphone or tablet’s screen has to have pixels too small for the unaided eye to discern. So on that level, then, it wouldn’t be hard; just scale up the resolution when you scale up the screen.

The problem is, that also requires scaling up the apps. Every last one of them. Unlike Android apps, which are (by and large) designed to fit into different screen sizes like websites are, iPhone apps are all designed for that one 3.5 inch screen size. When it switched to a Retina Display, it didn’t change the size; it just doubled the pixels on each side. That way the gorgeous, illustrated icons and backdrops on the old apps looked more or less the same, and it wasn’t too hard for developers to scale up their apps’ designs.

Change the screen resolution in any way besides doubling it, and you create a lot of work for app developers, who now have to create two separate layouts for each app (if they support the larger size at all). Oh, and doubling it again, to a roughly iPad-scale resolution? That’d be a ridiculous waste on anything much smaller than an iPad.

Apple doesn’t compete on specs

The kind of people who care about how many inches across the screen size is are the kind of people who buy phones based on specs; how many megapixels, megabytes, and gigahertz their innards have.

Most of them wouldn’t buy iPhones even if they had larger screens. That’s because they object to Apple’s designs for a number of other reasons, like that the OS isn’t open-source and doesn’t afford the same level of customization that Android does.

Larger screens do command attention at store displays. But with so many large-sized Android phones, an iPhone of equivalent size wouldn’t exactly stand out. And as “superhero” Dustin Curtis explains with diagrams, the current 3.5 inch iPhone screen is exactly the right size to use with one hand.

Could it still get a larger screen size?

According to “Year2″‘s forum post, the largest the iPhone’s screen can get while remaining at 300 ppi — the density needed for pixels to be indiscernible in a gadget held up to your face — is 3.8 inches across.

The new iPad’s screen is only 264 ppi, but it still counts as a Retina Display because you won’t typically hold tablets up to your face. If Apple really did make a 4.6-inch iPhone with the same resolution as the iPhone 4S, it’d have a 251 ppi display … possibly good enough to be held in both hands away from your face.

You’d have to use both hands, though, which is one thing Apple doesn’t appear to want to give up. And it’d look more than a little cheap if you could see the pixels on that “Retina Display” in normal smartphone use cases.

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