[joehewitt]

Here's an example of the problem it solves. I never log into Facebook in Safari because the Facebook app is a much better experience on iOS. Often I tap on links in native apps which go to facebook.com, and then I'm looking at the Facebook login page instead of the content I want to see.

This solution would allow apps (if they choose to use this service) to turn facebook.com URLs into fb:// URLs, and take me where I really want to go when I click those links.

Ideally iOS would provide this URL mapping, as Android does, so that this happened everywhere, not just apps that use this service. I wish Apple would do this. In the mean time, this is one approach we could take.