You’re right that a custom “Hey Grok” wake word isn’t really possible: iOS and Android only let the built-in assistant listen for a wake word in the background, not regular apps.
The realistic path is going through the system assistant, for example a Siri phrase or the iPhone Action Button that opens a voice chat with your bot directly. No ETA to share but definitely on our radar!
Yes, the action button could be set to start grok voice mode. Currently on Android I can already set it do “digital assistant” and options are: Gemini, Bixby, and Claude
So Claude can already do this, should not be a hard feature to implement for Grok Bot on Android.