Apple opens Siri to third party developers
This has nothing to do with 'open' :<p>Add SiriKit support only if your app implements one of the following types of services:<p><pre><code>    Audio or video calling

    Messaging

    Payments

    Searching photos

    Workouts

    Ride booking
</code></pre>
<a href="https://developer.apple.com/library/prerelease/content/documentation/Intents/Conceptual/SiriIntegrationGuide/index.html#//apple_ref/doc/uid/TP40016875" rel="nofollow">https://developer.apple.com/library/prerelease/content/docum...</a>