HP Prime Pro

I've been a long time fan of HP calculators. Love having a full powered HP calculator on my desktop. I wish the text was resampled and re-aliased in the emulator, and I wish the app's window size was more adjustable, but all in all, great calculator.

No it's not free, but it is worth the $20. All the other calculator apps on the windows store are just a joke. This has all the functions of a standard graphing calculator, and then some. If you are serious about school or math, then you should have this in your arsenal. This is a steal compared to a physical graphing calculator which needs batteries and can get damaged / lost.

On my HP laptop if I enter a number then press the subtract key on the numeric keypad the sign of the previous entry is toggled. Pressing the key multiple signs continues to toggle the entry sign from plus to minus, etc. If I press the minus key on the alpha numeric portion of the keyboard I get what one would expect, i.e., a minus sign after the first number entered, indicating the next value is to be subtracted from its predecessor. This may be by design to facilitate entering a negative number. If so, it would be good to have it pointed out in the documentation so as to reduce errors. I seems as though the - key on the numeric keypad has been mapped to the +/- key on the calculators virtual keyboard. After about 10 days of use and the 2/15/2017 upgrade I am changing my rating to 5 stars. Great app. Had to reset; which wiped out all my functions; as the crashing kept getting worse. Better now but not back to normal. Program has started exiting when certain buttons are pressed.

This app is amazing. It is very responsive. I haven't found any bugs "YET" but I wild report them when I do. I own a HP Prime and I have the desktop software but now I can use this app on my windows machine when I forget to bring my calculator(which the APP can't replace the feel of the keys).

So far, I love it. I've had the HP-65, 67, 41CV, 15C, 28CV, 12C and 42S This one has more stuff, which I'll work on, but I try to get the official HP calcs on my phone and PC because I like them, am used to them, and work well with them. This is new to me, and so far no problems. Well done, HP!