PCalc vs Convex Programmer's Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PCalc
A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.
- Optional RPN mode
- Multi-line display
- Extensive unit conversions
- Paper tape
- Multiple undo/redo
- Hexadecimal, octal, binary support
- Apple Watch app
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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!
Convex Programmer's Calculator
Convert numbers between hexadecimal, decimal, octal, and binary. Perform byte flips, bit shifts, and calculate two's complement. Features bit indicators and word grouping for improved binary readability.
- Number base conversion
- Two's complement calculation
- Byte flipping for endianness
- Left and right bit shifting
- Binary readability enhancements
- Copy, paste, and clear functionality
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Easily convert between hexadecimal, decimal, octal, and binary. Calculate the two's complement of any number. Flip a number's bytes to switch its endianness. Bit-shift left and right. Bit indicators and word grouping make binary easier to read. Tap the number to copy, paste, and clear. Swipe left or right on the number to backspace.
Screenshots
Verdict
The clearest difference is price: Convex Programmer's Calculator at Free against PCalc's $9.99. Convex Programmer's Calculator also leads on in-app purchases (none vs 4). PCalc's advantage is ratings volume (770 vs 6) and update cadence (every 6 weeks vs every 8 months). On rating, ads and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Convex Programmer's Calculator is free to download; PCalc costs $9.99 up front. PCalc sells 4 one-off in-app purchases. Convex Programmer's Calculator asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for PCalc against 4.7 for Convex Programmer's Calculator. That said, the two scores are not equally well evidenced: PCalc has 770 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 84% of PCalc's written reviews are positive against 67% of Convex Programmer's Calculator's.
PCalc ships an update every 6 weeks, Convex Programmer's Calculator every 8 months. The most recent releases landed on September 24, 2026 and June 11, 2026 respectively.
| Parameter | PCalc | Convex Programmer's Calculator |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.7 (770 ratings) | 4.7 (6 ratings) |
| Positive reviews | 83.6% of reviews — better | 66.7% of reviews |
| Number of ratings | 770 — better | 6 |
| Update frequency | Every 6 weeks — better | Every 8 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | #124 — better | — |
| Devices | iPhone, iPad, iPod, Apple Watch, Vision Pro — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 81 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | TLA Systems Ltd. | Matthew Daigle |
Customer experience
PCalc
Convex Programmer's Calculator
In-app purchases
PCalc
- Small Tip$0.99
- Medium Tip$1.99
- Large Tip$4.99
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- Enormous Tip$9.99
Convex Programmer's Calculator
No in-app purchases
