1. TowerGuy100's Avatar
    I would love an app that mimics a real desk adding machine. This doesn't just mean it has a tape display.

    A real adding machine uses the plus and minus keys to indicate if an entry is positive or negative. For example, to total 100 and 150 and -75, I should enter the following:

    100 +
    150 +
    75 -
    Then the * key to get an answer of 175.

    The difference between this and a calculator is that you are actually adding every number you enter, but some may be negative numbers.

    This may seem odd if you don't use an adding machine regularly, but if you do, you know how you get used to this way of adding.

    The other thing would be to have entries such as 1234 get converted on the fly to 12.34 as the + or - key are hit.

    Would I be the only one interested in such an app?
    rhippler likes this.
    05-16-2010 07:26 PM
  2. Execute's Avatar
    Would I be the only one interested in such an app?
    Yes.

    *In before typewriter, 21st century, and other related joker
    05-17-2010 01:34 AM
  3. dwhitman's Avatar
    You might want to try an RPN calculator. For simple calculations like you showed, the order of keystrokes is pretty similar:

    100
    enter
    150
    +
    75
    -
    05-17-2010 05:22 AM
  4. TowerGuy100's Avatar
    Thanks for the tip. I haven't been able to find one for Windows, so I shouldn't expect to find one for Android.
    05-19-2010 08:51 PM
  5. tof's Avatar
    I've just build an app which might fullfill your request, it's the
    taobits Office Calculator.

    It has a virtual tape and displays your calculation as expected.
    Unfortunately it doesn't yet support input without entering a decimal point.
    In fact I had implemented it this way, but than I thought, it would be too confusing for most users.
    But I'm already working on a version which will allow switching input mode between "manual decimal point" and "auto decimal point".
    05-21-2010 10:47 AM
  6. paul_aka_paul's Avatar
    tof - I just tried your calculator. My biggest knock right now is the size of the buttons. I LOVE the virtual tape. Since you already have the option of displaying the tape without the buttons, maybe you can squeeze down the display during the data entry portion.

    Also, its doesn't quite work like an adding machine. Using the OP's example of:
    100 +
    150 +
    75 -
    Then the * key to get an answer of 175.
    your app would show:
    100 +
    150 +
    75 -
    0+
    after pressing the = key.

    It isn't major, but if you are trying to match the adding machine it is small hiccup. And as far the auto decimal feature - I always turn that off, but I know plenty of people love it so good call on adding that in the future.

    Paul D. Accountant
    05-21-2010 12:20 PM
  7. tof's Avatar
    Paul, thank you for trying out my calculator and thank you for your feedback.
    Which device are you using, so that I can optimize the screen layout.
    I try to support 480x800, 320x480 and 240x320 (whicht gets quit small).
    tof
    05-21-2010 05:49 PM
  8. paul_aka_paul's Avatar
    I am using a Moto Droid.
    05-21-2010 06:03 PM
  9. tof's Avatar
    Hi Paul, finally I've completed a new version of my Office Calculator with bigger keys due to a redesigned keyboard layout, bigger display with auto downscaling for large number and a auto decimal point mode.
    Sorry that it took some time, but when I started working on the calculator I even had no physical device, so I couldn't see how small it looks on a real device.
    08-06-2010 03:25 PM
  10. meyerweb#CB's Avatar
    Thanks for the tip. I haven't been able to find one for Windows, so I shouldn't expect to find one for Android.
    There are at least two rpn calcs for Android. I'm using Real Calc, which has both RPN and regular modes. As for Windows,

    rpn calculator windows - Google Search

    If anyone's interested I've got one that was Shareware, but the developer is long since gone, so I don't feel guilty about sharing it.
    08-06-2010 08:23 PM
  11. winni2001's Avatar
    Just found your post while googleing "Android Adding Machine".
    Ich just created an app "Adding Machine". Can be found in Android Market.
    Yours
    winni2001
    11-29-2010 03:21 AM
LINK TO POST COPIED TO CLIPBOARD