title: Unity2d vs. Corona
body: <p>I'm using Corona SDK for few months. I really like it but yesterday I discovered Unity2d. It seems to be really expanded.
  I'm only interested about 2d games on Android (Google play store) and IOS (AppStore)</p>
  
  <p>Is Unity2d cross platform like Corona SDK? I write there code only once in Lua and I can deploy it on Android or IOS.</p>
  
  <p>Is Unity2d has many plungin like Facebook, twitter, in app pucharse etc. ?</p>
  
  <p>I saw unity Pro but it cost about 80$ per month. Free version is enough to make 2d game and publish it in the future?</p>
  
  <p>What is better corona sdk or unity2d in your opinion to make 2d games for Android or IOS?
  Thanks.</p>