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

[tcab]

It’s great we can keep old calcs alive forever like this on our touch devices. You can of course also get the HP Prime for Android.

If you ever have time, it would be interesting to know which specific apps you ended up with. I’ve found several different versions of the 48 for example and some are pretty poor, unresponsive implementations. And the 41 has several version, some of which are rudimentary, from memory.