Can I use private APIs for an iPhone Enterprise application?

I'm looking into developing an enterprise iPhone app. As it will be proprietary and will n开发者_如何学Goot be submitted to the App store, am I free to use private APIs?

I'm pretty sure the answer is yes, you can do what you like. Do bear in mind though that private APIs are more likely to break with iPhone OS updates.

There is no app review process for enterprise apps. So the answer is yes. What private API are you thinking of? I'm asking because I'm curious.