iOS UIWebView Does Not Zoom Enough

问题:

I have UIWebView and have [[self webView] setScalesPageToFit:YES].

Problem

When zooming in my webView the zoom isn't as magnified as it is on Safari.

Question

How can I accomplish the same zoom factor that Safari has?

Examples

This is what the first sentence at url http://www.apple.com/privacy/ looks like at max zoom:

On my webView

On Safari