# World Time Clock Master vs Oxford Button App

The clearest difference is in-app purchases: Oxford Button App at none against World Time Clock Master's 13. Oxford Button App also leads on update cadence (every 2 days vs fortnightly) and iOS requirement (15.0 vs 17.0). On price, ads 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. Oxford Button App asks for nothing beyond the download.

World Time Clock Master ships an update fortnightly, Oxford Button App every 2 days. The most recent releases landed on October 17, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | World Time Clock Master | Oxford Button App |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Subscription | — |
| Size | 236 MB | 32 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, Vision Pro | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alex Komarov Inc.](https://appshunter.io/developer/364741805) | [University of Oxford](https://appshunter.io/developer/688778837) |

## 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


### Oxford Button App

[App page](https://appshunter.io/ios/app/oxford-button-app/id6449711258)

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

**In-app purchases:** none


## Frequently asked questions

### Is World Time Clock Master free?

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

### Is Oxford Button App free?

Oxford Button App is free to download, with no in-app purchases.

### Do World Time Clock Master or Oxford Button App have ads?

Neither World Time Clock Master nor Oxford Button App shows ads.

### Which is updated more often, World Time Clock Master or Oxford Button App?

World Time Clock Master ships an update fortnightly, and Oxford Button App every 2 days. Most recently, World Time Clock Master was updated on October 17, 2026 and Oxford Button App on October 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*