# World Clock vs Overlap

The clearest difference is rating: Overlap at 4.8 against World Clock's 3.9. Overlap also leads on in-app purchases (none vs 1) and ads (none vs shown). World Clock's advantage is review sentiment (77% vs 67%) and update cadence (every 6 weeks vs every 3 months). On price and iOS requirement there is nothing between them.

Both are free to download. World Clock sells 1 one-off in-app purchase. Overlap asks for nothing beyond the download.

Overlap holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Overlap has 849 ratings behind it against 14, so its average is the more settled of the two. Written reviews complicate that: 77% of World Clock's written reviews are positive against 67% of Overlap's, so the app with the better star average is not the one people write more warmly about.

World Clock ships an update every 6 weeks, Overlap every 3 months. The most recent releases landed on June 9, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | World Clock | Overlap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (14 ratings)](https://appshunter.io/ios/app/world-clock-time-converter/id622366157/reviews) | **[4.8 (849 ratings)](https://appshunter.io/ios/app/overlap-world-clock/id1516950324/reviews)** |
| Number of ratings | 14 | **849** |
| Positive reviews | **77.4% of reviews** | 67.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Ad-supported | **Free** |
| Size | 6 MB | 71 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Fukui](https://appshunter.io/developer/575924491) | [Bonobo](https://appshunter.io/developer/666155611) |

## What reviewers say

### World Clock

[App page](https://appshunter.io/ios/app/world-clock-time-converter/id622366157)

Easily calculate time differences worldwide by scrolling a dynamic time bar. Add any city, set specific dates and times, and plan international meetings or calls effortlessly. The app syncs with iOS time data.

**Highlights:** Dynamic time bar for instant difference calculation, Add and manage multiple cities, Direct date and time specification, Customizable city names, Syncs with iOS time data

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertisement | $1.99 | one-time |


### Overlap

[App page](https://appshunter.io/ios/app/overlap-world-clock/id1516950324)

Easily find optimal meeting times across different time zones with a visual graph. Set custom availability for each location and sync with your calendar to avoid scheduling conflicts. Share convenient times directly from the app.

**Highlights:** Visual Overlap Graph for meeting times, Customizable availability hours per time zone, Calendar event integration, Multiple time zone display, Time zone renaming, Lock Screen Standby Mode widget

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Elegant and intuitive interface
- 🚀 Helpful for coordinating meetings across time zones
- 👍 Useful for tracking time differences globally
- 👍 Simple and easy to use
- 👍 Beautiful and sleek design

**What reviewers complain about**

- 🐛 Widget not working
- 🐛 Timezone data not always accurate
- 🐛 Duplicate timezone entries
- 🐛 App crashes and freezes
- 🔋 High CPU usage on Mac

**Reported bugs**

- Timezone data not updating correctly
- Inability to delete unwanted timezones
- Inconsistent behavior across platforms
- Typing issues on Mac version

**Requested features**

- Add option to reorder timezones
- Implement 24-hour clock display
- Allow customization of colors and backgrounds
- Integrate with calendar for scheduling
- Add weather information for each timezone


## Frequently asked questions

### Is World Clock free?

World Clock is free to download, with in-app purchases available.

### Is Overlap free?

Overlap is free to download, with no in-app purchases.

### Which has better reviews, World Clock or Overlap?

Overlap is rated higher. World Clock averages 3.9 out of 5 from 14 ratings, while Overlap averages 4.8 from 849 ratings.

### Do World Clock or Overlap have ads?

World Clock shows ads; Overlap does not.

### Which is updated more often, World Clock or Overlap?

World Clock ships an update every 6 weeks, and Overlap every 3 months. Most recently, World Clock was updated on June 9, 2026 and Overlap on September 24, 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.*