# PCalc vs Units Plus Converter

The clearest difference is price: PCalc at $9.99 against Units Plus Converter's $19.99. PCalc also leads on device support (5 vs 3). Units Plus Converter's advantage is in-app purchases (none vs 4) and update cadence (every 5 weeks vs every 3 months). On rating, review sentiment and ads there is nothing between them.

PCalc costs $9.99 and Units Plus Converter $19.99 up front. PCalc sells 4 one-off in-app purchases. Units Plus Converter asks for nothing beyond the download.

Units Plus Converter holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Units Plus Converter has 8.4K ratings behind it against 772, so its average is the more settled of the two. Written reviews point the same way: 83% of PCalc's written reviews are positive against 91% of Units Plus Converter's.

PCalc ships an update every 3 months, Units Plus Converter every 5 weeks. Both last shipped on October 21, 2026.

## The numbers

| Metric | PCalc | Units Plus Converter |
| --- | --- | --- |
| Price | **$9.99** | $19.99 |
| Rating | [4.7 (772 ratings)](https://appshunter.io/ios/app/pcalc/id284666222/reviews) | **[4.9 (8.4K ratings)](https://appshunter.io/ios/app/units-plus-converter/id593306620/reviews)** |
| Number of ratings | 772 | **8.4K** |
| Positive reviews | 83.3% of reviews | **91.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 367 MB | 7 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TLA Systems Ltd.](https://appshunter.io/developer/284666225) | [Alan Mrvica](https://appshunter.io/developer/593306623) |

## What reviewers say

### PCalc

[App page](https://appshunter.io/ios/app/pcalc/id284666222)

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.

**Highlights:** Optional RPN mode, Multi-line display, Extensive unit conversions, Paper tape, Multiple undo/redo, Hexadecimal, octal, binary support, Apple Watch app

**Features:** Apple Watch app, iMessage stickers, Fun Camera support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Enormous Tip | $9.99 | one-time |


### Units Plus Converter

[App page](https://appshunter.io/ios/app/units-plus-converter/id593306620)

Easily convert between various units and currencies with a simple, intuitive interface. Features live currency updates for 155 world currencies, refreshed every 15 minutes. Optimized for a wide range of Apple devices, including iPads with Split View support.

**Highlights:** Unit conversion across 12 categories, Live currency updates for 155 currencies, Optimized for iPhone and iPad, iPad Split View support, Data-computer data conversion, Fuel-mileage conversion

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Convenient and reliable
- 💰 Worth the purchase
- 🌍 Helpful for travel and international use
- 📊 Comprehensive range of conversions

**What reviewers complain about**

- 🐛 Occasional crashes or bugs
- 🔢 Limited unit options in some categories
- 🔍 Unintuitive interface for certain conversions
- 💰 Overpriced for the features offered

**Reported bugs**

- Decimal input not working
- Currency conversion not updating properly
- App crashing on certain devices

**Requested features**

- Add feet and inches conversion option
- Include kilojoules to calories conversion
- Improve currency conversion accuracy
- Add time zone conversion feature
- Provide more advanced unit options (e.g. torque, density)


## Frequently asked questions

### Is PCalc free?

PCalc costs $9.99, and also offers in-app purchases.

### Is Units Plus Converter free?

Units Plus Converter costs $19.99, with no in-app purchases.

### Which has better reviews, PCalc or Units Plus Converter?

Units Plus Converter is rated higher. PCalc averages 4.7 out of 5 from 772 ratings, while Units Plus Converter averages 4.9 from 8.4K ratings.

### Do PCalc or Units Plus Converter have ads?

Neither PCalc nor Units Plus Converter shows ads.

### Which is updated more often, PCalc or Units Plus Converter?

PCalc ships an update every 3 months, and Units Plus Converter every 5 weeks. Most recently, PCalc was updated on October 21, 2026 and Units Plus Converter on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*