Control data use per app
Scroll a bit further down in the Data Usage menu and you'll find a list of apps sorted by how much mobile data they use. Click on one of those apps and you'll see a few more options. Toggling Restrict Background Data on will stop the app from doing anything in the background, unless you're connected to Wi-Fi.
Brandon Vigliarolo has nothing to disclose. He does not hold investments in the technology companies he covers.
Brandon writes about apps and software for TechRepublic. He's an award-winning feature writer who previously worked as an IT professional and served as an MP in the US Army.