Calculator12 RPN App Reviews

Overall, works just like my HP12C but I wish start up was faster and inputs/assumptions included when results are emailed.

I will be using this for my finance class this semester and its cheaper than a real 12C!

The HP 12c is a standard - these folks kept the standard and improved it dramatically. HP simply recreated their calculator on an iPhone - didnt give any thought to improving it. In my mind, my "flagship" differentiator is the cash flow viewer/editor... if youve never tried it its slick IMHO. It allows you to see your cash flow entries as a cash flow diagram, and edit them (including adding and deleting individual cash flows) using the visual format--with the HP you can only delete the last cash flow and to do so you have to change the value of the n-register and you cant add a cash flow in the middle of your series. If you messed up entering the cash flows, you have to start over from CFo. Emailing results, in particular amortization tables and calculations dealing with cash flows and one-tap access to the forums FAQ page is very helpful - these guys did it right!!

Sure, its a nice calculator that does improves on the HP 12c, but it turns off the music when you use it. Its just a calculator, for cryin out loud.

Get rid of the annoying key click!

This calculator is a horrible rip off

I have used this for years with no problems. When HP is selling (finally!) their own version, which is buggy and costs more, I cant understand why someone thinks this is a rip- off.

Everything great. The only complaint I have is the enter button is below and right next to this new "undo" button. The new button is a great idea. but for someone who has used the 12c for years it is very easy to hit undo instead of enter if you are a little quick.

This is the best iPhone implementation of our favourite HP 12C calculator! Not only does it have all the features of the 12C, it also smartened it up with what a modern smartphone can offer with extra display info and conveniences. The pricing is also just right. Although I also have HP’s 15C port on my iPhone and use that for the various mundane calculations in a simplified portrait format, this one from Stone Meadow Development is my go-to for anything above that. No regret for the purchase from quite a while back and the support has been fantastic, now iOS7 updated. Can’t recommend enough!

This is a very nice implemtation of our beloved 12c. I love all the extra functionality. Its a little hard for me to use though, because some of the keys arent where Im used to seeing them. On the iPad, I hate that the stock background flashes before switching to my chosen background. Is there any way to get rid of that? Great calculator though and I havent noticed any other issues with it.