Recently when I am trying to use premium features in my iDevice it is asking to upgrade by paying some amount of money, but I am not that much interested to pay to download those features on my app, I just want to check all the features before going to pay for that app. So I search google for the apps which allow me to download premium apps and games for free. I tried Emus4u on my iDevice, it works something good, but if anyone knows more than those apps let me know.