Linking inside native iOS Apps
Links are the best and coolest feature the web has to offer. Connect different sites without the user having to install anything. And all this paired with the simple user interface of blue underlined text. It basically is the feature that gives the "web" it's name.
This is not the case when it comes to mobile apps. Even though iOS and Android have by now have the possibility for apps to link into each other, this is something we as developers have to explicitly implement.