PCalc vs Calculator HD Pro Lite
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!
Calculator HD Pro Lite
This app offers a user-friendly calculator with large buttons and extensive customization options. It features a dual-line display to see input and results simultaneously, saves your calculation history, and provides full scientific functions. Personalize layouts, themes, and even button symbols to suit your needs.
- Dual-line display
- Calculation history
- Full scientific functions
- Customizable layouts and themes
- Big buttons
- Email history
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A colorful calculator with big buttons, comprehensive features, and extensive customization. Used by millions. Supported by ads. SEE EVERY STEP ・Dual-line display - shows your input and result simultaneously ・Multi-line input for long equations ・Tap & hold to move the cursor or copy and paste where you want SAVE YOUR WORK ・History saves every calculation with time and date ・Label important calculations for easy reference ・Email single calculations or complete history ・Swipe down to review previous work CUSTOMIZE EVERYTHING ・6 layouts including extra-large button options ・10 color themes plus Dark Mode ・Adjustable font size and bold text ・Left-handed mode ・Show or hide features you don't need SCIENTIFIC FUNCTIONS ・Full scientific calculator when needed ・Memory buttons with values displayed ・Percentage and backspace buttons ・Automatic scientific notation ・VoiceOver accessibility OPTIONAL IN APP PURCHASES ・Today View Widget (iOS 17 and below) ・Multiple History Tapes ADDITIONAL FEATURES ・Customizable button symbols and decimal settings ・Multiple backspace button styles ・iPad Split View and 3D Touch support ・Gesture controls for quick access URL Scheme: calculatorhdprofree://
Screenshots
Verdict
The clearest difference is price: Calculator HD Pro Lite at Free against PCalc's $9.99. Calculator HD Pro Lite also leads on in-app purchases (none vs 4) and ratings volume (52K vs 779). PCalc's advantage is ads (none vs shown) and chart position (#90 vs unranked). On rating, review sentiment, update cadence 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
Calculator HD Pro Lite is free to download; PCalc costs $9.99 up front. PCalc sells 4 one-off in-app purchases. Calculator HD Pro Lite asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for PCalc against 4.6 for Calculator HD Pro Lite. That said, the two scores are not equally well evidenced: Calculator HD Pro Lite has 52K ratings behind it against 779, so its average is the more settled of the two. Written reviews are what separate them: 83% of PCalc's written reviews are positive against 77% of Calculator HD Pro Lite's.
PCalc ships an update every 6 weeks, Calculator HD Pro Lite every 2 months. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.
| Parameter | PCalc | Calculator HD Pro Lite |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.7 (779 ratings) — better | 4.6 (52K ratings) |
| Positive reviews | 83.4% of reviews — better | 77.3% of reviews |
| Number of ratings | 779 | 52K — better |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Best chart rank | #90 — better | — |
| Devices | iPhone, iPad, iPod, Apple Watch, Vision Pro — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.2 |
| Further details — not scored | ||
| Size | 83 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | TLA Systems Ltd. | Cider Software LLC |
Customer experience
PCalc
Calculator HD Pro Lite
Bugs and requests
PCalc
Not enough reviews yet to summarise bugs or requests.
Calculator HD Pro Lite
Reported bugs
3 issues- Calculation errors with very large numbers
- Crashes after recent update
- Decimal point displayed as comma
Requested features
5 requests- Dark mode option
- Ability to sync calculation history across devices
- More advanced math functions (e.g. dms/dd)
- Customizable button layout
- Ability to disable ads without paying
In-app purchases
PCalc
- Small Tip$0.99
- Medium Tip$1.99
- Large Tip$4.99
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- Enormous Tip$9.99
Calculator HD Pro Lite
No in-app purchases
