Really? I understand they can only target one mobile platform in the beginning, they don't want to spread themselves too thin, but why is a mobile device a requirement?
The answer I got was "to take pictures of checks you want to deposit" and "for our partner bank to get your signature". I have an Android device, but my wife has an iPhone so I answered iOS anyway, figuring I'd use her device. Turns out, I haven't _actually_ needed an iOS device for anything I've done yet.