It blows my mind that people still find out about this app and happily buy it every day even though it occupies such a small geeky niche.
Would you feel comfortable telling us the number of sales in 2013?
In 2013 it made $3900, or $325/month, and seems to be holding at that rate of income. The only work I did on the app in 2013 was about two days making it work correctly on iOS 7.
It's not huge money, but it's far more than my expectations, which were on the order of $500 total over the lifetime of the app.
I posted a breakdown of the first three months of reviews here: http://www.fourthdimensionapp.com/first_three_months/
My next app is a two-player Tetris/Scrabble mashup: http://fiascoapp.com/b
My expectations for the word puzzle game are either $300,000, or zero. The wave function has yet to collapse.
Then launched a card game which is a decent success..
Kudos anyway, great idea and looks like a great execution as well!