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Possible Duplicate:
Why does the iPad use nearest-neighbour scaling rather than Retina scaling for iPhone apps

iPad runs iPhone apps too. Sometimes people want to make it bigger and they click the "2x" button. Then the OS scales the app with pixel Doubling, which makes it look ugly because the whole app is pixelated.

Now that iPhone apps can be rendered at doubled DPI on an iPhone 4 with crystal clear quality, why doesn't Apple use this mode to display iPhone apps in 2x on an iPad? Is there a consideration other than time constraint?

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marked as duplicate by Nathan Greenstein Jun 18 '11 at 14:22

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

This question has already been addressed here, check out… – Matthew Frederick Jun 18 '11 at 13:59
Thanks although you closed my topic! :) The link helped answering my question, I didn't find it before posting my duplicate. – zavié Jun 18 '11 at 14:42
up vote 1 down vote accepted

It is likely to encourage developers to write native iPad apps instead of just relying on the higher resolution of retina artwork.

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