At its WWDC keynote today, Apple announced that it would open Siri up to third-party developers with a public API, allowing users to use Apple's personal assistant AI to summon third-party services and apps hands free.
Siri now supports a multitude of app types, including popular third-party messaging apps like WhatsApp and WeChat. Like with iMessage, Siri can be used to send texts to contact by uttering voice commands like "WeChat Kevin and tell him I'll be late." Siri can also be used for payment apps, VoIP apps and ride-hailing apps like Uber or Lyft.
The public API for Siri will be available for developers in the iOS 10 preview today, and will be available for users when iOS 10 launches in the fall.