Touch Fin RPN

Touch Fin RPN

By Elvis Pfutzenreuter

  • Category: Finance
  • Release Date: 2014-12-07
  • Current Version: 4.01
  • Adult Rating: 4+
  • File Size: 43.98 MB
  • Developer: Elvis Pfutzenreuter
  • Compatibility: Requires iOS 10.0 or later.
Score: 3.5
From 71 Ratings


Touch Fin RPN is an RPN financial and scientific calculator that implements most features of the industry-standard HP-12C, including programming functions. It also implements a scientific RPN flavor that implements most functions of the beloved 11C. And even more flavors (10C-like, 16C-like) can be purchased within the app.



  • Good but ...

    By softwarehobbit
    As the owner of a real HP 11C, it’s nice. But a couple of nits: The program does not accept input from a Bluetooth Keyboard. I’m not looking for magic here, but it should accept numerics, Period, Enter, Delete, up/down (roll the stack), +-x/. Maybe also C (CHS) and E (EEX), and CMD-Delete (clear stack) Why if one is has paid for the Premium Scientific calc one does not have access to the basic version?
  • Very disappointed, would like a refund

    By Steelheadhunter
    Had the 11c and liked it. Was offered this instead of a refund. Don’t want a 12c, that’s why I purchased the 11c. Recommend spending with someone who supports their product.
  • Why does this app keep asking for my iTunes password?

    By Fornographic
    Will delete if it isn’t fixed in update.
  • How to reset?

    By Nemesiss22i
    How do I reset my Calculator to decimal point?
  • Keeps promoting for my AppleID password

    By MacJohnMcC
    Frequently when I start the app I am prompted for my appleid password. This behavior is unique to this app.
  • Solver error

    By psb22
    Solve e^2x - 3e^x + 2 = 0 Input range of .1 to .8 gives the correct result same as a real 15C Input range of 0 to 1 and the real 15C says 0 which is a root. This app returns 1 which is incorrect. I now wonder what other bugs are in the solver. The bug has been fixed. Thank you!
  • Classic RPN HP emulators

    By CGE1400
    HP-16c emulator works exactly like the real one. A really useful app that one doesn’t have to learn. The real device & the app are the same. One nice extension for the app would be to show the stack contents in place of the ads once the version is purchased.
  • Quality product!

    By jski$$$
    I have spent quite a bit of time with the software engineering calculator, the 16i. I have discovered ZERO problems to date, BUT of course, as a software engineer, I have to admit that guarantees ZERO. So far, it appears to be an excellent, quality product. I'm glad to know the HP-16C lives on.
  • Excellent, with one annoyance

    By Heavy reader
    Perfect reproduction of HP’s much beloved classic calculator. My only complaint is that haptic feedback on key presses doesn’t work. I was looking forward to that. Apart from that, I can think of nothing to complain about. This is My go-to calculator.
  • Good upgrade

    By Dudenheimer
    It was already a decent app, but the update that added a green highlight as buttons are pushed (particularly when volume is off) fixed its biggest flaw.