Re: iinstalling apps in mobile
You install an iPhone app on an iPhone, and an Android app in an Android phone.
Just visit the appropriate app shop or market on your phone, find the app, choose it, pay for it if necessary and go forward with the installing. That's the same for all apps.
http://ipad.about.com/od/iPad_Guide/ss/iPad-101-New-Users-Guide-Install-Move-Delete-Folders_4.htm shows how to do with an iPad.