Android is unrealistic right now, as it pretty much will require a total rewrite.
We do hope to expand on more iOS and Apple platforms though (like apple TV and Mac).
I do get your frustration with Apples $99 yearly fee. However there are some reason behind it. Apple uses it as a filter so the app store is not riddled with junk. Also, you generally get "better" users on iOS than you do on android. And by better users I mean users who are engaged, more likely to play, more likely to appreciate the product, and just overall more rewarding for the developer. There is a reason why most major app releases are on iOS first.