So with this new scheme, you just pass the app a web URL and if a compatible mobile app is installed, it will automatically load that app instead of the web version. AppLinks will learn which links are handled by which apps. “We crawl the web for you. You don’t have to do it – but you can, you just don’t have to,” Sukhar said. Developers simply mark up their web pages with a few new meta properties. Facebook also offers a Parse module and an API to support these features.
Nice. Not the better inter-app communication that we've been wanting from Apple but it will help