Keep at it!!! Played with it a bit. Been searching for something like this. Can you try to add programming save/load? Would love it even more. It's basic on the language, needs some features.

Great work. Would be happy to donate to assist with finishing touches.

Finally somebody understands what a calculator is this program shows easy to use buttons, it doesn't try to draw an old calculator in you screen, if I need an old calculator i will take it out of my desk drawer. this calculator has a very good units interface i will let you multiply 3 different units (m) (in) (ft) and obtain m3. Like an hp 48 49 or 50. I was wondering why nobody takes the hp 48 or 49 rom and makes a proper emulator for andorid. Stop trying to invent new software just apply what works on the new platform. so far this is the best unit conversion and calculator combination you will find. I you need an excellent plain calculator use RealCalc. I you need to use units use this one. I also like the behavior of the sack on this one better than realcalc.

Great RPN calculator Always wanted a basic RPN calculator with a stack that's viewable/accessible. This one satisfies the viewable but I wish there was a straight forward was to get to a number deeper in the stack. Otherwise the 1/x right there is nice. I use it for basic math.

Thanks This works well for a nice simple rpn with a few functions. Maybe the undo could go on the front page? Has inverse and swap so I'm happy. Thanks

Tom Good work I like your design so far