PCalc Lite vs MR. CALC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PCalc Lite
This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.
- Optional RPN mode
- Multiple undo and redo
- Unit conversions and constants
- Two stylish themes
- Apple Watch app
Read full descriptionHide full description
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.PCalc Lite is a fully functional and free taste of our very popular scientific calculator. It includes an optional RPN mode, multiple undo and redo, unit conversions and constants, as well as two stylish themes and our highly praised design. A great choice for your new iPad! If you like what you see, the full version has many more settings and themes, a paper tape, engineering and scientific notation, and full support for hexadecimal, octal, and binary calculations. You can also now purchase extra features directly from inside PCalc Lite. Buy them individually, or buy everything. Includes an Apple Watch app, so you can calculate on your wrist!
MR. CALC
A straightforward calculator app for iPhone and iPad that displays formulas as you calculate. It offers seven different calculator types, easily switchable by swiping, making it convenient for managing multiple calculations simultaneously.
- Formula display during calculation
- Seven different calculator types
- Swipe to switch calculators
- Simple and easy to use
- Available for iPhone and iPad
Read full descriptionHide full description
It is a simple and easy to use calculator available for iPhone and iPad. Unlike the standard calculator app, the formula is displayed during the calculation. In addition, there are seven calculators available, and you can switch between them by swiping. This is useful when you are doing multiple calculations at the same time.
Screenshots
Verdict
The clearest difference is in-app purchases: MR. CALC at none against PCalc Lite's 11. MR. CALC also leads on rating (4.8 vs 4.4) and update cadence (every 10 days vs every 2 months). PCalc Lite's advantage is ads (none vs shown) and ratings volume (214 vs 39). On price and device support 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
Both are free to download. PCalc Lite sells 11 one-off in-app purchases. MR. CALC asks for nothing beyond the download.
MR. CALC holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: PCalc Lite has 214 ratings behind it against 39, so its average is the more settled of the two. Written reviews point the same way: 82% of PCalc Lite's written reviews are positive against 100% of MR. CALC's.
PCalc Lite ships an update every 2 months, MR. CALC every 10 days. The most recent releases landed on October 18, 2026 and October 4, 2026 respectively.
| Parameter | PCalc Lite | MR. CALC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (214 ratings) | 4.8 (39 ratings) — better |
| Positive reviews | 82.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 214 — better | 39 |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 76 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | TLA Systems Ltd. | Yuma Kitasei |
Customer experience
PCalc Lite
MR. CALC
Bugs and requests
PCalc Lite
Reported bugs
3 issues- Calculations sometimes produce unexpected results
- Upside-down text censorship feature is problematic
- Purchased features not always accessible on Apple Watch
Requested features
4 requests- Add option to display thousands separators
- Implement a history function to review past calculations
- Provide more customization options for the widget
- Add support for sexagesimal angle input and conversion
MR. CALC
Not enough reviews yet to summarise bugs or requests.
In-app purchases
PCalc Lite
- Theme Pack$0.99
- Power User Pack$0.99
- Multiple Line Pack$0.99
Show 8 moreShow fewer
- Conversion Pack$0.99
- Small Tip$0.99
- Medium Tip$1.99
- Programmer Pack$2.99
- Engineer Pack$2.99
- Large Tip$4.99
- Complete Pack$9.99
- Enormous Tip$9.99
MR. CALC
No in-app purchases
