How can I disable an app to use mobile data all the time?

[Android Central Question]

It's easy to restrict mobile data usage when an app is running in the background. But, with the iPhone, there is a function that the app can only be use while using wi-fi (disable mobile data all the time). how can this be done?

 

[ManiacJoe]

Normally this is a setting inside the app.

Which phone?
Which version of android?
Which carrier?
Which app?