PCalc - The Best Calculator

PCalc - The Best Calculator

By TLA Systems Ltd.

  • Category: Utilities
  • Release Date: 2008-07-11
  • Current Version: 3.7.1
  • Adult Rating: 4+
  • File Size: 65.03 MB
  • Developer: TLA Systems Ltd.
  • Compatibility: Requires iOS 8.0 or later.
Score: 4.5
From 1,150 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!



  • Perfect - hands down the best calculator

    By TimSpears
    Let's face it - ten bucks for a calculator app is a lot. For the tool that does the job I'm happy to pay it. This app has been maintained diligently for years and continually improved.
  • 5*+++

    By Idn86i
    Absolutely in love with this calculator app. How can anyone in the right mind give this app anything lower than 5 stars?? With all the features included, this thing is worth more than the price tag of $9.99. I even gave the devs some tips for the generous updates and loaded features. If you don’t have money and don’t know what you’re buying then use the free version, ahem* those 2-3 reviewers. Update: I’ve been overwhelming impressed by the quick responses from the dev (James).
  • Great app

    By Rlkcpo
    I love this calculator and use it daily. Would like to see the binary feature go beyond 16bits though.
  • Best calculator since the days of the HP35

    By NMSooner
    Best calculator I have ever had on my iPhone!! Reminds of of when I bought my HP 35 in the old days!!
  • Truly the best calculator app.

    By Zacharysbennett
    I’ve been using PCalc forever now and I could never imagine using my device without it. James is a super great developer, I highly recommend this application
  • Great calculator

    By wEbEr PeEpS
    Great flexibility in set up, nice conversion features and I find it intuitive and easy to use. Little learning needed.
  • Great app with accuracy issues

    By juntaone
    First, I really like PCalc overall, from its customization options to the Hitchhiker’s Guide references 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 email the developer about this same 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 at least the past year and a half Numbers, Apple’s calculator app, and every other “current” calculator app , correctly handle the above equation. However, 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 it mattered (it was 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.
  • Give $9.99 and...

    By BozoTcat
    Give $9.99 and still get hounded for a tip to open minor visually aesthetic features.
  • Worth getting just for the AR zaniness

    By *** Diabl0 ***
    This is the best calculator. Period/full stop. I’ve had it for years. It’s a go-to in almost every situation. But it just got better thanks to the dev’s whimsical AR Easter Egg. If you have iOS 11 and a supported device (I have iPhone 7+) then you owe it to yourself to buy the app just so you can see the magic of AR.
  • Amazing yet again!

    By Not a wb
    This is an amazing app. I wonder how many people will buy it just to play with your goofy AR kit. I hope it makes a fortune!