When I see a post like this, I am automatically skeptical. This one passes muster. Take a look.
My favorite was using Siri to jump to a specific app’s Settings page. I spent some time playing with this one and it does work well, but does not work with all apps. I suspect there’s some API the developer needs to support for this to work, and not all apps do that.
To try this for yourself, pick one of your apps, then fire up Siri and say:
Settings
Many apps jump right to their settings page. But some (looking at you Twitter app) throw Siri for a loop.