# PCalc vs World Clocks / Time Converter

The clearest difference is review sentiment: PCalc at 83% against World Clocks / Time Converter's 36%. PCalc also leads on rating (4.7 vs 2.0) and ads (none vs shown). World Clocks / Time Converter's advantage is in-app purchases (none vs 4) and price ($4.99 vs $9.99). On iOS requirement there is nothing between them.

PCalc costs $9.99 and World Clocks / Time Converter $4.99 up front. PCalc sells 4 one-off in-app purchases. World Clocks / Time Converter asks for nothing beyond the download.

PCalc holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: PCalc has 779 ratings behind it against 2, 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 36% of World Clocks / Time Converter's.

PCalc ships an update every 6 weeks, World Clocks / Time Converter every 3 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | PCalc | World Clocks / Time Converter |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Rating | **[4.7 (779 ratings)](https://appshunter.io/ios/app/pcalc/id284666222/reviews)** | [2.0 (2 ratings)](https://appshunter.io/ios/app/world-clocks-time-converter/id363739385/reviews) |
| Number of ratings | **779** | 2 |
| Positive reviews | **83.4% of reviews** | 35.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 83 MB | 6 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TLA Systems Ltd.](https://appshunter.io/developer/284666225) | [ABCOM](https://appshunter.io/developer/327443601) |

## 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, iPhone Duo 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 |


### World Clocks / Time Converter

[App page](https://appshunter.io/ios/app/world-clocks-time-converter/id363739385)

Easily track time across multiple global time zones with accurate DST calculations. Select from over 400 cities worldwide, customize clock names, and enjoy automatic time adjustments without needing internet access.

**Highlights:** 12 clocks for 12 different time zones, Timezone selection from 400+ cities, Customizable clock names, Accurate DST rule application, Automatic time adjustments, Perpetual clocks with future DST accounting

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

**In-app purchases:** none


## Frequently asked questions

### Is PCalc free?

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

### Is World Clocks / Time Converter free?

World Clocks / Time Converter costs $4.99, with no in-app purchases.

### Which has better reviews, PCalc or World Clocks / Time Converter?

PCalc is rated higher. PCalc averages 4.7 out of 5 from 779 ratings, while World Clocks / Time Converter averages 2.0 from 2 ratings.

### Do PCalc or World Clocks / Time Converter have ads?

World Clocks / Time Converter shows ads; PCalc does not.

### Which is updated more often, PCalc or World Clocks / Time Converter?

PCalc ships an update every 6 weeks, and World Clocks / Time Converter every 3 months. Most recently, PCalc was updated on November 6, 2026 and World Clocks / Time Converter on November 6, 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.*