Can Push Notifications to Smartphone Play a Sound Yet?

I’d like to add smartphone push notifications to my Meteor web app. I.e. the phone is off, the web app isn’t open in the browser, but a push notification can still be received by the phone.

Here is an article reviewing some of the top push notification services:

After a lot of Google-ing, I haven’t yet found the answer to a couple of questions:

  • If the phone is off, can the push notification play a sound on the phone?
  • Can the push notification show a slider or button that can open my Meteor app in the default browser?

Thanks very much in advance to all for any info.