These exact clones of vintage HP calcs are on my Android phone...

[Eric Rechlin]

My main concern about the "go" emulators is that they use HP intellectual property (ROMs) to function, many of which aren't even properly licensed, but then cost money, so the author is profiting tens of thousands of dollars off of stealing HP's IP. If they were open-source, even if he charged a nominal (say, $1) fee for the app download, I wouldn't have a problem with it.