Not long ago, someone asked (on Facebook) how sales of the game on the Android platform compared to iOS. I recently got some quarterly updates, so figured it was a good time to share.
The majority of copies sold are on mobile, and the bulk of those for iOS.
The second largest outlet has been GOG.com, which sells the original version.
Comparing any of these is difficult, since the game has been on iOS longer than it has been available for Android, and Steam is even more recent. GOG sometimes runs sales of bundles, so not all of those copies might have ever been launched.
Plus, some of the numbers aren’t exact, due to how we get reports. (For example, I have no idea how many units were sold on Windows Phone, but I know it has to be insignificant.) Even the number of boxed CDs is an estimate.
But to answer the question: iOS is indeed selling better than Android (by about 2:1 over the last month).