I question I get a lot in my email is:
Do you have an Android version?
My answer is:
No, we do not have an Android version at this time.
This is basically all I can say in an email. Here is the longer answer. We do not have and it is unlikely that we will, and the reasons are time and money.
Time is very important. We are a very small company. Supporting apps on a single OS involves a lot of work. For a long time (from 1995 to 2007), we had apps on only one OS: Windows. It makes a lot of sense for a small company to concentrate on only one OS. You can learn it well.
For many years, I thought we would never have a Mac version. It didn't make sense. But then it started becoming clear that Apple was going somewhere, so in 2007 we added a Mac version. It was a good decision, but it also took a lot of time. Now my attention was split two ways.
Then in 2013, we added an iPad version (probably a couple of years too late). The iPad version was easier than adding the Mac because a lot of code can be shared between them, but still it is a completely different operating system. Now we are split 3 ways.
We hope to add iPhone to this, as it is another easy add, given how close it will be to the iPad (mainly just screen size differences, although in some games that is huge).
Android would split things even more, leaving less time to deal with our Windows/Mac/iPad apps. But its worse than that: Android has lots of different types and different devices. And then you have Android devices like the Kindle. Android is a technical nightmare. The time involved would be huge.
And then there would be money. It would cost a lot to develop an Android version. And Android apps make far less than iOS apps, so we know that it would be for an amount of income far, far smaller than what we currently make from the iOS apps. It just makes no sense whatsoever.
Unless things change radically it seems unlikely we will ever have an app written specifically for Android.
Update: We now have online games that will work on Android tablets. These games are at http://www.goodsol.com/play . They will work on desktops, laptops, and tablets in the browser. In addition to Android tablets, they will work on the Kindle Fire too!