Where? I said mobihand and handango.
Try placing a ".com" after either for better luck. For example, in your computer browser, type www dot mobihand dot com in the browser
and replace "dot" wit a "."
On your PC you will see this link: www.mobihand.com
Each applications is different, some need data plans and some don't. For example a game of solitaire will not, but an app to check the weather might (since it has to pull data on the weather forecast from somewhere).
So your question impossible to answer until you look at each individual app you want.