PCalc vs QR Keeper
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!
QR Keeper
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Keep a QR Code diary! * Capture and remember QR Codes * Offline focuse
Screenshots
Verdict
The clearest difference is price: QR Keeper at Free against PCalc's $9.99. QR Keeper also leads on in-app purchases (none vs 4). PCalc's advantage is device support (5 vs 2) and iOS requirement (15.0 vs 17.6). On ads 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
QR Keeper is free to download; PCalc costs $9.99 up front. PCalc sells 4 one-off in-app purchases. QR Keeper asks for nothing beyond the download.
| Parameter | PCalc | QR Keeper |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.7 (779 ratings) — better | — |
| Positive reviews | 83.4% of reviews | — |
| Number of ratings | 779 — better | — |
| Update frequency | Every 6 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Apple Watch, Vision Pro — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 83 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | TLA Systems Ltd. | Alain Hoang |
In-app purchases
PCalc
- Small Tip$0.99
- Medium Tip$1.99
- Large Tip$4.99
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- Enormous Tip$9.99
QR Keeper
No in-app purchases
