Hey Siri, why can't I use you on more apps?

Last summer, Apple was busy advertising its latest move to beef up Siri, the personal digital assistant for the iPhone, iPad and Mac computers. For the first time, Apple said, developers would be able to use Siri with our favorite apps, thus promising a brighter future for the heavily used, but often maligned, voice computing tool. "Siri," Apple said in September, when the latest IOS mobile operating system was released, "works with your favorite apps from the App Store." Apple in 2016 opened up Siri to bring the personal assistant to apps, but few developers have signed on. Jefferson Graham explains why, on #TalkingTech.