# World Time Clock Master vs Cool Ukiyo

The clearest difference is ads: World Time Clock Master at none against Cool Ukiyo's shown. World Time Clock Master also leads on update cadence (fortnightly vs monthly). Cool Ukiyo's advantage is iOS requirement (12.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. World Time Clock Master sells 10 in-app purchases, starting at $2.99 per month and Cool Ukiyo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

World Time Clock Master ships an update fortnightly, Cool Ukiyo monthly. The most recent releases landed on September 29, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | World Time Clock Master | Cool Ukiyo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (816 ratings)](https://appshunter.io/ios/app/world-time-clock-master/id6448859727/reviews)** | — |
| Number of ratings | **816** | — |
| Positive reviews | 65.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Subscription | — |
| Size | 236 MB | 53 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad, Vision Pro | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alex Komarov Inc.](https://appshunter.io/developer/364741805) | [Mihoko Araki](https://appshunter.io/developer/1476136915) |

## What reviewers say

### World Time Clock Master

[App page](https://appshunter.io/ios/app/world-time-clock-master/id6448859727)

Effortlessly manage multiple time zones with this app. Convert times instantly, schedule events, and view global clocks at a glance with interactive widgets. Features atomic accuracy and a vast database of locations.

**Highlights:** Multiple time zone display, Interactive time conversion, Event scheduling, Atomic time accuracy, Dynamic home screen widgets, List mode for text view, Real moon phases and sunrise/sunset

**Features:** Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $2.99 | per month |
| 3 months | $3.99 | per 3 months |
| 1 year | $11.99 | per year |
| 1 year | $11.99 | per year |
| 1 year | $11.99 | per year |
| 1 year | $19.99 | per year |
| Lifetime | $29.99 | one-time |
| Lifetime | $49.99 | one-time |
| Lifetime | $79.99 | one-time |
| Lifetime | $99.99 | one-time |

**What reviewers like**

- 🚀 Delightful scheduling assistance
- 👍 Feature improvement
- 👍 The best Timezone helper
- 👍 One of the best clocks around
- 👍 The Widget is so damn cool!

**What reviewers complain about**

- 🐛 Problemas al actualizar
- 🐛 Sticky signup interface
- 🐛 Demo not enough
- 🔒 NOT A FREE APP
- 💰 Terrible monetisation model compared to previous app

**Reported bugs**

- Lose all the registered locations after updating the app
- Sticky signup interface
- Widget doesn't work
- GMT and London currently have a 1 hour time difference between the two locations, but the app shows them the same time

**Requested features**

- Add the time difference in hours between the default location and other locations in both the widget and the app
- See my calendar events on the dial
- Make a paid tier that doesn't collect my data
- Add new event to a Calendar


### Cool Ukiyo

[App page](https://appshunter.io/ios/app/cool-ukiyo-e-clock/id6503263276)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cool Ukiyo-e Clock with no ads | $3.99 | one-time |


## Frequently asked questions

### Is World Time Clock Master free?

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

### Is Cool Ukiyo free?

Cool Ukiyo is free to download, with in-app purchases available.

### Do World Time Clock Master or Cool Ukiyo have ads?

Cool Ukiyo shows ads; World Time Clock Master does not.

### Which is updated more often, World Time Clock Master or Cool Ukiyo?

World Time Clock Master ships an update fortnightly, and Cool Ukiyo monthly. Most recently, World Time Clock Master was updated on September 29, 2026 and Cool Ukiyo on September 9, 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.*