I've heard of the app, and it's great news. But I feel that with just a little push (well, not so little, but small at Github scale), the mobile website could be so much better, and everyone would benefit from it without installing an app (although with an Instant App one could have the best of both worlds… but just on Android).
The demo of Emily and Jon's work shown by Nat is great news and I hope it continues forward.
And yes, we're also definitely investing in the mobile app as well and the reception from the beta has been really positive so I'm excited for when we're able to roll it out to everyone.