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I want to start designing iOS app UI in Photoshop but I can't find up-to-date tutorials and informations about document resolution, ppi of document, getting retina ready and complete guide for it. Does anybody know any good tutorials?

  • Why would PPI matter if you design for the screen? – joojaa Sep 16 '16 at 6:12
  • PPI = Pixels Per Inch. Android has many different PPI across its devices, iOS has a few, it's still an issue. He's asking where he should start, in terms of a PPI, so he can assess the quality of the artwork in actual pixels. I think. – Confused Sep 16 '16 at 8:59
  • are you sure the Apple Developer guidelines doesn't cover that? – Luciano Sep 16 '16 at 9:20
  • Tutorials on using Photoshop for UI design? I'm 100% sure it doesn't cover that. I'm answering the joojaa question about importance of PPI consideration. – Confused Sep 16 '16 at 12:23
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This information is fragmented, like Android device resolution. Apple stopped caring about designers when they realised the iPod was way more successful than their pandering to the DTP community ever made them.

This, combined with a near pathological disdain for Adobe (largely warranted) means they don't provide useful templates or other resources to work in 1x, 2x and 3x at the same time.

And then there's the enormous fun of the scaling on the iPhone 6/6S/7 PLUS models.

As a starting point, that's not ideal, begin working in the lowest resolution of the smallest device you'll be targeting. Probably the iPhone 5/5S/SE's 4 inch display, which is 1136x640

This is a 2x screen. You don't really need 1x graphics anymore. But you do need 3x plus a scaling offset for the Plus series phones. All the iPads now run at 2x.

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