First I really love the transparency and this whole article. I’ve always been interested in app developement and getting this insider view of your sales, expectations and development costs is super intersting!
I think sales are low because there just aren’t enough people aware of the launch. Your email subscribers already own this game, so there is a very low chance they will purchase again, unless they are super fans, which I think is the reason for the sales you were abale to achieve.
To achieve sales I think its all about new users and you haven’t mentioned marketing besides trying to reach your already active fan base through social media.
Have you reached out to publications? Offered free review copies? Taken interviews? You need free publicity and you can do this through traditional publications, but also online personalities.
Finally I think if you want to convince your current fan base to purchase the iOS version, there needs to be huge new features or expansion that is exclusive to the iOS version for at least a period of time. This however would cost more money, so its maybe an option down the line, but for now I think you should consider your marketing strategies and getting the word out to as many people as possible.
I’m currently a Political Science Major in my 4th year, but have always been interested in game/app development. I would love to help you in anyway I can, discussions on strategies, reaching out on your behalf and so on. I really feel I can help your company. I would do anything you needed for free because it would give me increased knowledge of the space and valuable experience.
Please do not hesitate to reach out to me, I would love to help. Before anything I could tell you more about me and my work expirence.