# 24h World Clock vs Circa³

The clearest difference is update cadence: Circa³ at monthly against 24h World Clock's every 31 months. Circa³ also leads on device support (4 vs 2) and iOS requirement (11.0 vs 18.0). 24h World Clock's advantage is price ($0.99 vs $3.99) and review sentiment (75% vs 63%). On ads and in-app purchases there is nothing between them.

24h World Clock costs $0.99 and Circa³ $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

24h World Clock ships an update every 31 months, Circa³ monthly. The most recent releases landed on October 17, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 24h World Clock | Circa³ |
| --- | --- | --- |
| Price | **$0.99** | $3.99 |
| Rating | — | **[4.5 (384 ratings)](https://appshunter.io/ios/app/circa-time-zone-converter/id968698352/reviews)** |
| Number of ratings | — | **384** |
| Positive reviews | **75.0% of reviews** | 63.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 31 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 13 MB | 39 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Mate Muller](https://appshunter.io/developer/485179292) | [Kostiantyn Zuiev](https://appshunter.io/developer/1053341480) |

## What reviewers say

### 24h World Clock

[App page](https://appshunter.io/ios/app/24h-world-clock/id493844852)

This app provides a unique 24-hour analog clock face to display multiple time zones simultaneously. It offers comprehensive time zone management, personalization options, and detailed information for each zone, all presented with an elegant dark interface.

**Highlights:** Unique 24-hour analog clock face, Simultaneous display of multiple time zones, Comprehensive time zone database, Customizable time zone labels, Interactive world map view, DST status indicators, Personalization options

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

**In-app purchases:** none


### Circa³

[App page](https://appshunter.io/ios/app/circa-time-zone-converter/id968698352)

Easily manage time across different locations and time zones. Find optimal meeting times and generate invitations that suit everyone's schedule. This tool helps synchronize teams working in various parts of the world.

**Highlights:** Compare time across multiple locations, View working hour overlaps, Integrate calendars, Organize personally, Create one-touch meeting invitations

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 24h World Clock free?

24h World Clock costs $0.99, with no in-app purchases.

### Is Circa³ free?

Circa³ costs $3.99, with no in-app purchases.

### Do 24h World Clock or Circa³ have ads?

Neither 24h World Clock nor Circa³ shows ads.

### Which is updated more often, 24h World Clock or Circa³?

24h World Clock ships an update every 31 months, and Circa³ monthly. Most recently, 24h World Clock was updated on October 17, 2026 and Circa³ 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.*