What is the standard font and size for the iPhone navigation header?

Question

Can someone tell me, please, what is the standard font and size for iPhone design?

Thanks in advance.

Answer 1

Helvetica Bold, size 20.

To get it, you can use this convenience method if Apple ever decides to change the font:

UIFont *navigationTitleFont = [UIFont boldSystemFontOfSize:20.0f]; 

Answer 2

According to Apple docs

The text in the navigation controller uses the same font size that uses body style text for large customization (in particular, 17 points).

So, I think System (Helvetica Neue) Bold 17.

Source: https://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/ColorImagesText.html