This question already has an answer here:
- Can I use Siri with these apps? 1 answer
Is there a general way extend Siri on iOS 8 to use other apps?
For instance, I am not using the apple E-Mail app but "myMail". I'd like to make Siri use this app when telling her to write an e-mail?
By extension, can non-apple apps for sending instant messages, listening to music be plugged into Siri?