This is far from enterprise software: I am planning all three apps to be free on Apple's App Store. I have (or will have) a web site for each, with extra material, terms of service, privacy info, etc. I will have links to my consulting web page and my books page so I might indirectly earn some income.

I have the same attitude with apps as with the books I write: if some people enjoy them and I get to occasionally meet (probably virtually) app users and book readers, then I am very good with that.

re: "going into their hobbyspace is an escape from the world of work-for-a-living": for most people this is really important. For me, I go wilderness hiking every day and have a hobby of cooking so I have several hours a day away from technical interests.