Mobile apps tend to be convinient for most users as we always tend to be on the move. I hate apple but if they allowed such apps i would buy one this instant, apple is far more secure than android and they may end up missing out on the train as more apps are developed bringing crypto to the world. I think it has something to do with their trying to make their own currency, i however thing it's a fail as it may be limited to apple products and services whereas other cryptos aim to be globaly used in any way possible.