I wish I had a better answer than "we're still figuring things out and I don't want to duplicate work yet", but that's where I'm at. We are a really small team (1 designer, 3 engineers, 1 community manager, 1 ceo, 1 professional snapchatter (me)) so right now we are conserving our meager engineering resources until we really believe that it is worth replicating on Android. But we will eventually.