# AtomicClock vs Big Child Treasures

The clearest difference is ads: Big Child Treasures at none against AtomicClock's shown. Big Child Treasures also leads on iOS requirement (14.0 vs 17.4). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. AtomicClock sells 1 one-off in-app purchase and Big Child Treasures sells 2 in-app purchases, starting at $24.99 per year. Whichever you choose, the download price is not the number that matters.

AtomicClock ships an update monthly, Big Child Treasures every 5 weeks. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | AtomicClock | Big Child Treasures |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.6K ratings)](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049/reviews)** | — |
| Number of ratings | **5.6K** | — |
| Positive reviews | 84.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 57 MB |
| Requires iOS | 17.4 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Timo Partl](https://appshunter.io/developer/1387413672) | [Diaple Networking SL](https://appshunter.io/developer/564471872) |

## What reviewers say

### 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


### Big Child Treasures

[App page](https://appshunter.io/ios/app/big-child-treasures/id6749852344)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BCT Lite Subscription | $24.99 | per year |
| BCT Premium | $79.99 | per year |


## Frequently asked questions

### Is AtomicClock free?

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

### Is Big Child Treasures free?

Big Child Treasures is free to download, with in-app purchases available.

### Do AtomicClock or Big Child Treasures have ads?

AtomicClock shows ads; Big Child Treasures does not.

### Which is updated more often, AtomicClock or Big Child Treasures?

AtomicClock ships an update monthly, and Big Child Treasures every 5 weeks. Most recently, AtomicClock was updated on November 6, 2026 and Big Child Treasures on October 30, 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.*