PCalc Lite vs Calculator Tax+
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
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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.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!
Calculator Tax+
This free calculator app for iPad offers a clean interface with multiple themes and advanced functions. It's ideal for both personal finance tracking and business calculations, allowing users to easily review and share their calculations.
- Retina display compatible
- 3 elegant themes
- Intuitive interface
- Double line display
- Tax+ button
- Grand Total button
- Tape display
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Calculator Tax+ is a free and simple calculator for the iPad (with retina display). Features: o Retina display compatible o 3 elegant cool themes to choose o Intuitive interface o Double line display calculation o Great for personal record keeping and businesses Functions: o Tax+ button o Grand Total button o Rounding off to two decimal places o Tape display showing equation and result simultaneously o Easy mistake correction editing o Instantly email your tape o Copy and paste ***Please see the Calculator Tax+ Help for instructions in the app settings***
Screenshots
Verdict
The clearest difference is rating: Calculator Tax+ at 4.8 against PCalc Lite's 4.4. Calculator Tax+ also leads on review sentiment (92% vs 82%) and iOS requirement (7.1 vs 15.0). PCalc Lite's advantage is update cadence (every 2 months vs every 6 months) and ratings volume (214 vs 13). On price, ads, in-app purchases and monetization model 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 and Calculator Tax+ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Calculator Tax+ 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 13, 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 92% of Calculator Tax+'s.
PCalc Lite ships an update every 2 months, Calculator Tax+ every 6 months. The most recent releases landed on October 29, 2026 and October 22, 2026 respectively.
| Parameter | PCalc Lite | Calculator Tax+ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (214 ratings) | 4.8 (13 ratings) — better |
| Positive reviews | 82.5% of reviews | 92.1% of reviews — better |
| Number of ratings | 214 — better | 13 |
| Update frequency | Every 2 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPad |
| Requires iOS | 15.0 | 7.1 — better |
| Further details — not scored | ||
| Size | 79 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | TLA Systems Ltd. | Radin Alcira |
Customer experience
PCalc Lite
Calculator Tax+
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
Calculator Tax+
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
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- 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
Calculator Tax+
- Ad Removal$0.99
