surface of your app: does it look, interact, and feel like an iOS app? If you can do that, the language doesn’t matter. ! There is no right answer to this question. Choose what the language that speaks to you and then go build something awesome.” ! Justin Williams, Learning How To Make Sausage
for develop iOS and Android apps The framework API’s have always been the secret sauce. Whether you’re using Objective-C, Swift, C#, or Ruby you’re still going to have to learn how to use a UIButton or a UITableView. Swift, Ruby or Objective C are only tools, you can do great thinks with any, choose what tool you love the most!