By TLA Systems Ltd.

  • Category: Utilities
  • Release Date: 2008-07-11
  • Current Version: 3.8.8
  • Adult Rating: 4+
  • File Size: 97.46 MB
  • Developer: TLA Systems Ltd.
  • Compatibility: Requires iOS 9.0 or later.
Score: 4.5
From 1,402 Ratings


PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a paper tape, multiple undo and redo, engineering and scientific notation, as well as support for hexadecimal, octal, and binary calculations. Includes an Apple Watch app, so you can calculate on your wrist!



  • Great calculator app, but

    By LeeTheMusicBee
    It's $10 up front and the dev locks some other features behind another paywall, this time described as a "tip" jar. Here's the thing: it doesn't count as "tipping" or "donating" if you have to pay that money to access other features. I paid $10 non refundable, I wasn't expecting to be asked to pay more. For this reason I am docking a star
  • One sweet calculator

    By AstroRetro
    This is the last calculator you will ever have to enjoy! It rules all other calculators. I have a few others and they are permanently shelved after using 42. It as simple as that.
  • It can be anything you want it to be

    By Claudius Marcus
    I have downloaded (and bought) many iPhone calculators and PCalc is by far the best. The depth and breadth of this app is a true labor of love by the author who has spend decades perfecting it (see his website). As an RPN lover and HP calculator addict, I have searched for and tried most of the offerings in the app store only to be disapointed by the rediculous skeuomorphic designs that abound. With PCalc, the amount of custimization possibilities is dizzyingly vast but, once the shock of available options wears off, you are rewarded with a true sense of empowerment. Case in point: I love the elegance and simplicity of the original HP35 from 1972. I was able to duplicate this keyboard layout and, with the appropriate theme, I was able get it looking very nice. This took me a while but my layout is automatically saved to iCloud where it syncs with my other iOS devices. The layout customization is very sophisticated, allowing you to have keys that are hidden until the 2nd key is pressed. All the labels for each key can be set to whatever you want. I'll stop here not because there is not more to say, but because this calculator shines once you start exploring the many options available. The point being, if you don't like what you see in the default layouts, you can make it be anything you want it to be.
  • Piece of crap

    By bobw13402
    This calculator does not appear to support 64 bit hex calculations, so I just wasted 9.99, since a calculator that does not support 64 bit is worthless to me.
  • The best calc app.

    I enjoy using this app for the following reasons: the multitude of interchangeable appearances, colors, styles & layouts, converting units, calculating in normal - engineering - scientific - accounting - fractional modes. I dislike viewing the delayed branding on startup, which inclines me to use my native iOS calculator app for visual simplicity. I would also prefer one less step to enter fractional calculations.
  • Landscape view iPhone - awful - keys scattered

    By Gometric
    Using iPhone in landscape view, keys are scattered; completely unusable - keys are on top of each other - you can’t use some built in functions.
  • Just like your default calculator! Do not buy!

    By bryan.y.yu
    I am disappointed in. Is app. This app was in the App Store for the Apple Watch and I thought it could do the scientific calculations from the Apple Watch but you can’t. You can only do simple math problems with multiplication, addition, subtraction, division and tip calculations, etc,. I thought that it could perform scientific calculations on the watch (since it was in the Apple Watch App Store) but that’s only if you used you iPhone which is stupid because your iPhone can already do that out of the box. I think this app is well overpriced and it doesn’t offer any special features to carry a price tag of $9.99. I wished that I could get my money back. It can’t even do simple currency conversions! It’s just an overpriced calculator app that I’ll never use on my iPhone 10s because I’ll just use the default calculator.
  • 42

    By xxbmmc
    The answer to “Life, the Universe, and Everything.” Darned near!
  • Thanks!

    By david10110
    Nothing but good things to say - outstanding app and a template for how to properly execute software development. My highest compliments to you! David
  • Personalization

    By Pi_Phi
    Just, the themes!! Go from classic Mac & Tron (mechanical keyboard sounds too!) all the way to the wonderfully plastic-y round buttons of 2006. The app icons come from a variety of backgrounds, including: classic movies, internet communities, Trans pride, and a good ol' smattering of colors. Oh, by the way, did I mention the pandas? Pascal is my favorite mascot of all time. Their expressions are so vivid and clear, I am genuinely filled with joy every time I see them. And the sticker pack is to die for!! Please, play around with this app. I don't use calculators often, but when I do, I choose PCalc.