Why Apple Isn't Building an Amazon Echo Rival

In terms of sales, the iPhone is clearly Apple's most important product. But a relatively unsung hero for the company is Siri, its voice-activated digital assistant. While Siri is primarily available on iPhones, it has also made its way to Macs, the [f500link]Apple[/f500link] TV and automobiles via Apple's CarPlay platform. Even Apple's new AirPods wireless earbuds have Siri capability.