# Atomic Clock PRO vs Longines VHP GMT Flash Setting

The clearest difference is rating: Atomic Clock PRO at 4.7 against Longines VHP GMT Flash Setting's 3.0. Atomic Clock PRO also leads on review sentiment (73% vs 33%) and ratings volume (10K vs 7). Longines VHP GMT Flash Setting's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Atomic Clock PRO sells 2 in-app purchases, starting at $1.99 per month. Longines VHP GMT Flash Setting asks for nothing beyond the download.

Atomic Clock PRO holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 73% of Atomic Clock PRO's written reviews are positive against 33% of Longines VHP GMT Flash Setting's.

Atomic Clock PRO ships an update every 3 months, Longines VHP GMT Flash Setting every 2 months. The most recent releases landed on September 23, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | Atomic Clock PRO | Longines VHP GMT Flash Setting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (10K ratings)](https://appshunter.io/ios/app/atomic-clock-pro/id899090224/reviews)** | [3.0 (7 ratings)](https://appshunter.io/ios/app/longines-vhp-gmt-flash-setting/id1432553194/reviews) |
| Number of ratings | **10K** | 7 |
| Positive reviews | **72.7% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 83 MB |
| Requires iOS | 15.6 | **9.3** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brachmann Online Marketing GmbH & Co. KG](https://appshunter.io/developer/682848918) | [Compagnie des Montres Longines Francillon SA](https://appshunter.io/developer/366643895) |

## What reviewers say

### Atomic Clock PRO

[App page](https://appshunter.io/ios/app/atomic-clock-pro/id899090224)

Get the most accurate time from an official atomic clock server. This app automatically detects your time zone and allows custom backgrounds. Easily switch between digital and analog clock displays with a swipe.

**Highlights:** Exact time from atomic clock, Automatic time zone recognition, Customizable background images, Digital and analog clock modes, Optional sound alerts, Color customization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | per month |
| Remove Ads | $5.99 | one-time |

**What reviewers like**

- ⭐ Accurate time display
- 📟 Useful for timing events
- 🕰️ Helpful for setting other clocks
- 🔍 Large, easy-to-read clock face

**What reviewers complain about**

- 💸 Subscription model for ad-free version
- 📢 Excessive advertisements
- 🔍 Small font for seconds display
- 🔀 Difficulty in displaying both analog and digital clocks simultaneously

**Reported bugs**

- Second hand occasionally runs in reverse
- Digital clock display cuts off on some devices
- Inconsistent behavior when switching between clock types

**Requested features**

- Customizable clock face options
- Ability to set widget on home screen
- Sync with system clock to automatically update time


### 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 Atomic Clock PRO free?

Atomic Clock PRO 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, Atomic Clock PRO or Longines VHP GMT Flash Setting?

Atomic Clock PRO is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while Longines VHP GMT Flash Setting averages 3.0 from 7 ratings.

### Do Atomic Clock PRO or Longines VHP GMT Flash Setting have ads?

Atomic Clock PRO shows ads; Longines VHP GMT Flash Setting does not.

### Which is updated more often, Atomic Clock PRO or Longines VHP GMT Flash Setting?

Atomic Clock PRO ships an update every 3 months, and Longines VHP GMT Flash Setting every 2 months. Most recently, Atomic Clock PRO was updated on September 23, 2026 and Longines VHP GMT Flash Setting on June 9, 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.*