According XDA, Motion Sense will work with a total of nine apps out of the box, with an additional 14 apps to be added upon the first update for the feature. The nine primary apps are listed below: On a side note, it’s not susprising to see YouTube Music on that list and not Google Play Music. We know that Google is planning on slow phasing out the Google Play Music app with YouTube Music, we just weren’t expecting such an aggressive push from the search engine, and most certainly not this soon. https://www.youtube.com/watch?v=KnRbXWojW7c Beyond controlling the flow of your tracks via gesture, it’s also been rumoured that Motion Sense will be embedded into other functionalities of the Pixel 4. Such as silencing calls or to simply check notifications and time. (Source: XDA via 9to5Google, Hot Hardware)