The Restrictions you can impose on your devices running iOS 8 have changed and it is prudent for you to check them out. It is one of those pay me now or pay me later things.
As an example: If you don’t have an unlimited data plan, it may be important to you that apps can’t access cellular data.
Choose System > Cellular.
Scroll down and you will find a whole list of apps that probably have cellular access turned on. Just turn them all off for cellular access, or make your selections by app.
Location is another thing to check out.
Choose System > Privacy > Locations Services
There is a whole list of apps that will allow full access to your location. You should check them out and make decisions that meet your needs.
While you are in Privacy mode, scroll down to Advertising. You can limit websites from tracking you to see what websites you visit or what you buy by just turning on Limit Ad Tracking.