# World Clock -Time Converter- — Time Difference Calculator

> Global time difference calculator with a dynamic scrolling interface. (iPhone/iPad app by Yuki Fukui.)

- Source: https://appshunter.io/ios/app/world-clock-time-converter/id622366157 (this page in markdown: same URL + `.md`)
- Developer: [Yuki Fukui](https://appshunter.io/developer/575924491)
- Category: Utilities, Travel
- Price: Free with in-app purchases
- Rating: 3.93/5 from 14 App Store ratings · 62 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 6 MB
- Languages: English, Japanese
- Released: 2013-04-29
- Data updated: 2026-06-09
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/world-clock-time-converter/id622366157/reviews.md

## What is World Clock?

"World Clock" is the best app to calculate time differences all over the world.
All cities' times change automatically just by scrolling it with your finger.
Therefore, you don't need to add or subtract times any more to calculate time differences.

■■Features■■
-Scrolling the time bar on the side of the screen up and down simultaneously changes the time in each city to the future or past.
-Double-tap the time bar to change the time unit between 1 minute and 1 hour.
-You can add any city from the list of cities provided in the app. 
-Tap each city to specify the date and time directly.
-Press and hold on a city to change the city and edit the custom name.
-Only one fixed city can be displayed at the top of the screen.

■■Examples of use■■
-International meeting planner
-International call
-Trip planning

Disclaimer:This application has been built with extreme care and attention. However, it does not guarantee the accuracy of the names and times of the cities displayed.
Please note that we are not liable whatsoever for any profit loss, or any other form of loss experienced by the customer from using this application.

※We don't have any time difference data in our app.
We have been inquiring about time differences of each city to iOS.
Therefore, “World Clock” shows you the time of iOS.
As a result, depending on the version of iOS you are using, the exact time may not be displayed.
If you find a time lag in our app, please confirm default "Clock" app on your iPhone.
If the time in "Clock" app is the same with the time in our “World Clock”, it means that our app is running normally.

※Abbreviated name of time zone was originally researched and added.
If you notice any mistakes, please contact us from the support site.

※The screenshots are specially edited not to show ads.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## Recent user reviews (10 of 62)

All indexed reviews: https://appshunter.io/ios/app/world-clock-time-converter/id622366157/reviews.md

### 1/5 — Purchased ad removal

*2026-04-27*

I purchased as removal a while back and it now says that product has been discontinued and restoring it doesn’t work. I’m sure it’s a bug but when it’s fixed I’ll change my review.

### 5/5 — Best time zone converter app

*2025-11-21, version 6.0*

I tried many and this is the best. Simple, clean interface with current comparison and easy ability to shift to a future date and time.

### 2/5 — 世界の時差を見るのに日本語表示しかできない欠陥がある

*2025-06-27, version 5.8*

英語表記とは言わないまでも国旗表示なり対応できると思うんですが、世界の時差を確認するのに日本語表示だけってものすごく不便です

でももう更新対応もしてないみたいだし、せっかくいいのに中途半端な感じですね
いいものだけど、iPhoneのオリジナル時計とそう変わらないものを作っても便利とは言えないので、☆2止まりです

更新対応あればfullにしたく思います
これでは誰にもオススメはできないから

### 4/5 — 活用させて貰っています

*2024-08-28, version 5.1*

シンプルで使いやすいですね。サマータイムがひと目で分かる様になると更に便利かと思うのですが。EDT、ESTでは直感的に分かり辛いもので。。よろしくお願い致します。

### 5/5 — 現地時間同士の計算ができるのは楽

*2024-02-26, version 5.1*

世界時計は現在の時間が表示されるアプリは多々あるが、外国と外国の時間を計算するアプリはなかなかなかった。
日本から出張しA国から、B国主催のオンライン会議に出る予定の場合、A国で何時なのか、その場合ホテルはもう一泊必要なのか、飛行機は何時で取れば無駄がないか考えたり計算がめんどかったがこれは1発で時間が出るので非常に便利！
保存とメモ機能が追加できるとアプリで完結できるし、それを共有(メール、PPT、LINE、SNS)や書き出し(PDFや画像)できると楽かなと。

### 5/5 — Perfect App

*2023-09-22, version 4.8*

A perfect app where you can view the local time, timezone, hours ahead/before, GMT, and date in one look. As a suggestion, I just hope we have the option to minimize the font size.

### 3/5 — メモ機能

*2023-03-14, version 4.7*

一覧画面で、簡単にメモが見えるようにしてくれると非常にありがたい。
複数の友人がおり、誰がどの国かパッと見て判断したいので友人の名前をメモしたいです。

### 4/5 — something with summer/winter time?

*2022-03-14, version 4.3*

cf above

### 5/5 — Best Time App

*2021-08-11, version 4.0*

You can easily adjust the time when in different time zones, perfect for travelers. I used it the whole time i was in california, super helpful :))

### 4/5 — [Req] Country name in English

*2021-05-19, version 3.9*

It's very useful, but it’s a shame that the current location and selected countries name can’t be displayed in English. It’d be nice if they will be able to be changed in English.

## Frequently asked questions about World Clock

### Does World Clock have ads?

Yes, World Clock contains advertisements. The screenshots provided were edited to not show ads.

### How accurate is World Clock?

The app relies on iOS time data. While built with care, it does not guarantee the absolute accuracy of city names and times displayed, and users are advised to cross-reference with their default Clock app if discrepancies are found.

### What devices does World Clock support?

World Clock is available for iPhone and iPod devices.

### How do I change the time unit in World Clock?

You can change the time unit between 1 minute and 1 hour by double-tapping the time bar on the side of the screen.

### Can I edit city names in World Clock?

Yes, you can press and hold on a city to change its name and edit custom names.

### What is the age rating for World Clock?

World Clock has an age rating of 4+.

### How often is World Clock updated?

The app was last updated on March 20, 2026, with version 6.3.

### What are the main use cases for World Clock?

World Clock is useful for planning international meetings, making international calls, and for trip planning across different time zones.

## Version history (last 5 releases)

### 6.4 — 2026-03-30

– Fixed a bug where incorrect characters were inserted into the time difference display when using 12-hour format.
– Fixed a bug where the indicator color did not change when the theme color was changed.
– Fixed a bug where text on settings screens and other areas was difficult to read in dark mode when the theme color was black.

### 6.3 — 2026-03-20

– Minor adjustments.

### 6.2 — 2026-03-20

– Minor adjustments.
– Libraries have been updated to the latest versions.
– Updated some existing cities.

### 6.1 — 2026-01-03

– Minor adjustments.
– Libraries have been updated to the latest versions.
– Added 179 new cities.
– Updated some existing cities.
– The processing method for time zone abbreviations has been changed.
– The notation for time differences has been changed from GMT to UTC.

### 6.0 — 2025-10-14

- Fixed city list.
- Minor adjustments were made.

## Apps similar to World Clock

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [World Clock Time Zone Widget](https://appshunter.io/ios/app/world-clock-time-zone-widget/id912698955) | 4.7 (29,677) | Free | Utilities |
| [World Clock. Time Widget](https://appshunter.io/ios/app/world-clock-time-widget/id1453369651) | 4.7 (3,892) | Free | Utilities |
| [World Time Clock Master](https://appshunter.io/ios/app/world-time-clock-master/id6448859727) | 4.7 (688) | Free | Utilities |
| [World Clock Pro: Convert Time](https://appshunter.io/ios/app/world-clock-pro-convert-time/id969635117) | 4.8 (1,263) | Free | Utilities |
| [Zen World Time Converter](https://appshunter.io/ios/app/zen-world-time-converter/id1467876592) | 4.6 (180) | Free | Utilities |
| [World Clock-Timezone Converter](https://appshunter.io/ios/app/world-clock-timezone-converter/id1425332311) | 4.8 (602) | Free | Utilities |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*