# AtomicClock vs Hamilton Watch Scanner

The clearest difference is in-app purchases: Hamilton Watch Scanner at none against AtomicClock's 1. Hamilton Watch Scanner also leads on ads (none vs shown) and iOS requirement (15.5 vs 17.4). On price, update cadence and device support there is nothing between them.

Both are free to download. AtomicClock sells 1 one-off in-app purchase. Hamilton Watch Scanner asks for nothing beyond the download.

AtomicClock ships an update monthly, Hamilton Watch Scanner every 6 weeks. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | AtomicClock | Hamilton Watch Scanner |
| --- | --- | --- |
| 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 | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 88 MB |
| Requires iOS | 17.4 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Timo Partl](https://appshunter.io/developer/1387413672) | [Hamilton International Ltd.](https://appshunter.io/developer/1587654942) |

## 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


### Hamilton Watch Scanner

[App page](https://appshunter.io/ios/app/hamilton-watch-scanner/id1608906417)

**In-app purchases:** none


## Frequently asked questions

### Is AtomicClock free?

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

### Is Hamilton Watch Scanner free?

Hamilton Watch Scanner is free to download, with no in-app purchases.

### Do AtomicClock or Hamilton Watch Scanner have ads?

AtomicClock shows ads; Hamilton Watch Scanner does not.

### Which is updated more often, AtomicClock or Hamilton Watch Scanner?

AtomicClock ships an update monthly, and Hamilton Watch Scanner every 6 weeks. Most recently, AtomicClock was updated on October 19, 2026 and Hamilton Watch Scanner 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.*