This is often a returning topic here on HN where most users probably work in startups and/or companies with consumer facing apps. Those would want every platform to have the look & feel of the platform you're running on. Although... Seems the new version of iOS Skype is WP8 styled and feels a bit alien on iOS while it's not unpleasant at all. So not sure if I agree always. Anyway; if you have apps for internal use or use with partners, it is actually often better for the apps to be 100% identical on all platforms as that will save tons of support calls. That's why a lot of companies just do iOS first, design it for that and will make the Android version exactly identical. To save time there, often HTML5/Cordova is used for that by internal departments / IT, but I know you can make MUCH nicer apps in the same / less time if you use Xamarin (Forms or Metaframe) (or maybe a solution like this) (although I cannot imagine IT would pick JS over .NET or Java, ever).