Do apps have to be open to receive notifications?

[applelover4u]

Do the apps have to be open in order to receive notifications?

 

[applelover4u]

I guess no ones knows?

 

[vexorg]

I would say yes, unless they have some background service running.

Though on the iPhone, you can kill an app and it still gets updates and notifications. I don't think IOS really kills them, can sayfor sure on OS X, mail and other I use won't update unless running