Yeah. I don't think they've updated their mobile apps yet. I'm unable to buy on Android either (I don't even see an Ether wallet on mobile). I was able to purchase Ether via their webpage. At the time, it matched pretty well with other exchanges (~$12.50). As a disclaimer, I'm not trying to push Coinbase in any way, I just thought it was interesting to see a major player adding Ether support.