What does the iOS eco system have over Android that makes developers churn out prettier apps?


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I'm stunned by how beautiful Over/Overgram for iOS is. The closest app that I can find that matches it in simplicity and functionality is Phonto. Does anyone know of another app?

On that note, what is it about the iOS eco system that just churns out apps that are not only great in terms of functionality but also beautiful and a joy to use? Both OSes have good developers but the iOS community just seem to put a tad more effort on good UI design than their colleagues developing for Android. We can even see this, astonishingly, in Google apps. Many native Google apps are just a tad more beautiful on iOS (Revamped Gmail for example).