I am considering to create a web browser which is different from normal one, which focuses on English learner or helps you to understand difficult English for instance, thesis, legal document etc. so I will add like a dictionary, new service(I wanna make it secret) etc and I wanna create web page or application too, but the web app's contents are different from the browser's one completely, if users put a PDF file, it returns a new pdf file that is re-written somewhat(I wanna make this secret).
in a nutshell, I wanna create Android app, iPhone app and web app.
my basic info: I am good at java. and now I'm studying ruby.
I know creating an Android app, I'd better use java. However, for creating an iPhone app, I cannot use java, and I don't want to use Objective-c either. for creating web app, I will use ruby.
what programming language you recommend? thank you for reading this question and answering ! PS. My mother tongue is NOT English, so sorry if I make mistakes.