You can't. ipods only have the apple app store. Are you sure its not Android? If it is you should look for Google play, and if it doesn't have that you can download apps from the internet. Just search the app name and put " .apk " after it and download the file and when its done pull down the notification bar, click on it. And it should ask you if you want to install it. say yes. wait. then it should ask if you want to open it. open it to see if it works.