By TLA Systems Ltd.

  • Category: Utilities
  • Release Date: 2008-07-11
  • Current Version: 3.8.1
  • Adult Rating: 4+
  • File Size: 96.42 MB
  • Developer: TLA Systems Ltd.
  • Compatibility: Requires iOS 9.0 or later.
Score: 4.5
From 1,329 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!



  • Works great – ANIMATED PANDAS!

    By iphonereviewer#2
    This app runs circles around any other calculator in the App Store, and is well worth the price. No problem installing it on phone or Watch, also version for TV and macOS, and functions great on all devices. App author is very responsive & regularly updates the app with new features. if you run into a problem email or Twitter him instead of writing negative reviews! Holy 💩! Animated 🐼 stickers now! This calculator app does everything you could dream up — except for a kitchen sink — but it can calculate the size of one if you give it the dimensions!
  • Usered for years

    By yakster
    I definitely recommend this calc
  • Best for RPN

    By The emusifyer
    I much prefer RPN (it’s really RPL) and this app has worked great for years. I prefer this over others.
  • Best calculator yet

    By JohnB1111
    I have used many calculators over the last 50 years, and using those in comparison, this is the best one yet. Not convinced? Go to the pcalc website and download the manual!
  • Calculate? PCalc. The best. 42! All 1. OK!

    By fjpoblam
    The first point of a computing device is to calculate. PCalc. It’s in my dock on MacOS and iOS: first 3rd party app I sought. Fast and stable. Feature-rich. Perfect for conversions, science, advanced math. Customizable keyboard. Superb tape (for fat fingers or printing for CPAs at tax time). Built-in constants, functions, and conversions out the wazoo. The icon says it all. 42: the ultimate answer. Uneeda PCalc.
  • Phenomenal

    By Zeke and Crowly
    Amazing calculator and one which is vigilantly overseen by its developer who keeps it as good as it gets. Well worth the investment.
  • Great app with accuracy issues

    By juntaone
    First, I really like PCalc overall, from its customization options to the Hitchhiker’s Guide reference to the widget. Great features and easy to use. My issue is that it still has accuracy problems. Enter .5 - .4 - .1. Instead of 0, PCalc returns -2.7755575616E-17. A few years ago I emailed the developer about this issue and he explained it was a problem in Apple’s libraries used to create the PCalc. Fair enough. At the time, Apple’s calculator app and Numbers both exhibited the same problem, as did many other calculators (but not all). However, for more than two years Numbers, Apple’s calculator app, and every other “current” calculator app , correctly handle the above equation. PCalc STILL gives the same incorrect answer (just tried it on a fresh install on a new iPhone). So either Apple fixed their libraries or the Numbers team and every other calculator programmer/team is using an alternative math library. Some will consider this an outlier issue, but I’ve had it crop up several times in calculations where precision mattered (it’s one reason I stopped using Numbers until Apple fixed it). You may ask why I use this app if I feel I can’t trust it. Well, I don’t. But I do keep checking it to see if it’s fixed because I’d like to use it. Please fix this issue once and for all and I’ll happily give PCalc the 5 stars it deserves. But right now it gets 2 stars for accuracy. 2018-8-23 Update Same issue remains. Great app marred by accuracy. And no word from the developer 😕. At this point I’ve switched to Calzy. Cool features and accurate.
  • Impressive

    By Rambo8649
    The best and most comprehensive and customizable calculator app for I have ever used. Really impressive. I ended up buying for MacOS too. I use primarily for mathematics and physics.
  • Difficult to find what your looking for.

    By CelticEddieL
    I own several calculator apps but with this one I can’t seem to get beyond basic function capability. Even after paying $10 for the full version it looks like I paid for just a basic calculator. That means the advanced functions are really not there or to difficult to figure out how to get to. It’s great for doing conversions or using physical constants. However, for any kind of advanced math, I will have to go to my other apps.
  • Best Calculator I’ve Ever Used

    By gwmelchi
    I am a retired biochemist. I used a slide rule for the first 10 years of my career and then the finest HP calculators that were available until I retired. This PCalc is as good or better for my purposes than any other calculator I have ever owned. I use strictly RPN, and there are a couple of quirks that you have to get use to, e.g. you have to use the “swap” key when solving combinatorics with the built in combination and permutation keys, which is anti intuitive, but easy to get use to. Overall this is a really nice calculator and I can recommend it for most common math applications with no reservations.