# AtomicClock vs Longines VHP GMT Flash Setting

The clearest difference is review sentiment: AtomicClock at 84% against Longines VHP GMT Flash Setting's 33%. AtomicClock also leads on rating (4.8 vs 3.0) and ratings volume (5.5K vs 7). Longines VHP GMT Flash Setting's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. AtomicClock sells 1 one-off in-app purchase. Longines VHP GMT Flash Setting asks for nothing beyond the download.

AtomicClock holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: AtomicClock has 5.5K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 84% of AtomicClock's written reviews are positive against 33% of Longines VHP GMT Flash Setting's.

AtomicClock ships an update every 3 weeks, Longines VHP GMT Flash Setting every 2 months. The most recent releases landed on October 17, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | AtomicClock | Longines VHP GMT Flash Setting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.5K ratings)](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049/reviews)** | [3.0 (7 ratings)](https://appshunter.io/ios/app/longines-vhp-gmt-flash-setting/id1432553194/reviews) |
| Number of ratings | **5.5K** | 7 |
| Positive reviews | **84.2% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 83 MB |
| Requires iOS | 15.0 | **9.3** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Timo Partl](https://appshunter.io/developer/1387413672) | [Compagnie des Montres Longines Francillon SA](https://appshunter.io/developer/366643895) |

## 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


### Longines VHP GMT Flash Setting

[App page](https://appshunter.io/ios/app/longines-vhp-gmt-flash-setting/id1432553194)

This app allows users to set their Longines VHP GMT Flash Setting watch using light. It offers a second time zone and is designed for travelers.

**Highlights:** Flash Setting technology, Second time zone, Quartz movement features, Sporty and elegant design, Ideal for travelers

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AtomicClock free?

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

### Is Longines VHP GMT Flash Setting free?

Longines VHP GMT Flash Setting is free to download, with no in-app purchases.

### Which has better reviews, AtomicClock or Longines VHP GMT Flash Setting?

AtomicClock is rated higher. AtomicClock averages 4.8 out of 5 from 5.5K ratings, while Longines VHP GMT Flash Setting averages 3.0 from 7 ratings.

### Do AtomicClock or Longines VHP GMT Flash Setting have ads?

AtomicClock shows ads; Longines VHP GMT Flash Setting does not.

### Which is updated more often, AtomicClock or Longines VHP GMT Flash Setting?

AtomicClock ships an update every 3 weeks, and Longines VHP GMT Flash Setting every 2 months. Most recently, AtomicClock was updated on October 17, 2026 and Longines VHP GMT Flash Setting on October 13, 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.*