# World Clock Pro vs AtomicClock

The clearest difference is monetization model: AtomicClock at free with in-app purchases against World Clock Pro's subscription. AtomicClock also leads on update cadence (every 3 weeks vs every 2 months) and ratings volume (5.5K vs 1.3K). World Clock Pro's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, rating, review sentiment and in-app purchases there is nothing between them.

Both are free to download. World Clock Pro sells 5 in-app purchases, starting at $1.99 per month and AtomicClock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for World Clock Pro against 4.8 for AtomicClock. Both are backed by a comparable volume of ratings — 1.3K and 5.5K respectively. Written reviews are what separate them: 77% of World Clock Pro's written reviews are positive against 84% of AtomicClock's.

World Clock Pro ships an update every 2 months, AtomicClock every 3 weeks. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | World Clock Pro | AtomicClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (1.3K ratings)](https://appshunter.io/ios/app/world-clock-pro-convert-time/id969635117/reviews) | [4.8 (5.5K ratings)](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049/reviews) |
| Number of ratings | 1.3K | **5.5K** |
| Positive reviews | 76.7% of reviews | **84.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 41 MB | 17 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alex Komarov Inc.](https://appshunter.io/developer/364741805) | [Timo Partl](https://appshunter.io/developer/1387413672) |

## What reviewers say

### World Clock Pro

[App page](https://appshunter.io/ios/app/world-clock-pro-convert-time/id969635117)

Easily track and convert time across multiple global time zones. Schedule events, share accurate times instantly, and access a vast database of cities and time zones. Ideal for international communication and planning.

**Highlights:** Universal clock access, Effortless time conversion, Schedule calendar events, Instant time sharing, Large city and timezone database, Automatic timezone updates

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $1.99 | per month |
| 1 month | $2.99 | per month |
| 1 year | $9.99 | per year |
| 1 year | $11.99 | per year |
| 1 year | $19.99 | per year |

**What reviewers like**

- 🚀 Elegant and intuitive interface
- 🔍 Excellent visualization of multiple time zones
- ⏱ Seamless time shifting
- 🌍 Convenient for international teams and travelers
- 📆 Helpful for scheduling across time zones

**What reviewers complain about**

- 🐛 Widget issues and lack of functionality
- 🖥 Lack of iPad and landscape mode support
- 🔧 Concerns about app updates and feature removals
- 💰 Complaints about subscription model and pricing

**Reported bugs**

- Widget not working on iOS 14 and newer
- Issues with local time zone detection and display
- Inconsistent behavior after app updates

**Requested features**

- Add date function for future time zone changes
- Ability to customize and sort displayed time zones
- Implement an Apple Watch app
- Improve widget functionality and customization


### AtomicClock

[App page](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049)

This app displays the exact current time synchronized with NTP servers, offering a customizable clock view for precise time checks. It's ideal for setting watches, verifying timestamps, or comparing local and network time.

**Highlights:** Precise time from NTP servers, Customizable clock faces, Select or add time servers, Local and UTC views, 12/24 hour modes, Customizable time format, Acoustic ticking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro Version | $6.99 | one-time |

**What reviewers like**

- 🚀 Accurate time
- 👍 Highly customizable
- 🚀 Precise to the second
- 👍 Easy to use
- 👍 Helpful for setting watches

**What reviewers complain about**

- 🐛 Server connection issues
- 🔍 Limited time zone options
- 💰 Ads diminish clock view
- 🔍 Lacks some advanced features
- 🔍 Redundant for some users

**Reported bugs**

- Crashes on certain iOS versions
- Occasional freezing of hands
- Countdown timer sound not working

**Requested features**

- Add GMT/dual time display
- Implement widget support
- Add different second hand sounds
- Allow setting background color to match watch
- Include alarm/timer functionality


## Frequently asked questions

### Is World Clock Pro free?

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

### Is AtomicClock free?

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

### Which has better reviews, World Clock Pro or AtomicClock?

World Clock Pro and AtomicClock are both rated 4.8 out of 5 on the App Store, from 1.3K and 5.5K ratings respectively.

### Do World Clock Pro or AtomicClock have ads?

AtomicClock shows ads; World Clock Pro does not.

### Which is updated more often, World Clock Pro or AtomicClock?

World Clock Pro ships an update every 2 months, and AtomicClock every 3 weeks. Most recently, World Clock Pro was updated on October 11, 2026 and AtomicClock on October 14, 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.*