Comparison

Atomic Clock PRO vs Longines VHP GMT Flash Setting

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Atomic Clock PRO

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
Read full description

Get accurate time on your iPhone and iPad by syncing with an official atomic clock time server. Download now for free! If you want exact time, a precise time reference, or an easy-to-read clock display, this app is designed for that. It automatically recognizes your time zone, lets you use one of your own photos as the background, and lets you switch between a digital display and a classic analog clock with a simple swipe. It is ideal as a personalized desk clock, a reliable travel companion, an everyday reference clock, or when you need exact time to set a mechanical watch accurately. Overview: - Accurate and precise time synced from an official atomic clock time server - Automatically recognizes your time zone and shows the current local time - Choose digital, analog, or combined analog and digital clock displays - Swipe to switch between clock displays - Resize the digital clock for a larger or smaller display - Includes time (hours, minutes, and seconds), date, and day of the week (optional) - Optional sound every second or every minute - Change clock and background colors - Use your own photos as background images - Choose atomic clock sync or your device's system clock - Option to keep the screen awake while the app is open - Works in portrait and landscape mode - For iPhone and iPad Helpful for: - A personalized desk clock at home or at work - Getting the correct local time while traveling - Setting a mechanical watch accurately - A clear reference clock when you want accurate, easy-to-read time PLEASE NOTE: You can switch between the analog and digital clock by swiping left or right across the clock. Disclaimer: Please note that whilst all reasonable care has been taken to make this application as accurate as possible we can not guarantee 100% accuracy. Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Longines VHP GMT Flash Setting

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
Read full description

The Conquest V.H.P. represents a new achievement in the field of quartz, combining great precision, high technicality and a sporty look, marked by the brand’s unique elegance. Longines now offers new variations that bring together all the qualities of the Conquest V.H.P. movement, further enriched by a second time zone as well as an innovative system called “Flash Setting” that sets the watch using light. These features make the Conquest V.H.P. GMT Flash Setting an ideal accoutrement on the wrist of any keen traveller, who will appreciate this loyal companion on their journeys far and wide across the globe. Please find here more informations : https://www.longines.com/watches/flashsetting/infos

Screenshots

Atomic Clock PRO4 screens
Longines VHP GMT Flash Setting4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Atomic Clock PRO versus Longines VHP GMT Flash Setting: the parameters behind the verdict, then further details
ParameterAtomic Clock PROLongines VHP GMT Flash Setting
PriceFreeFree
Rating4.7 (10K ratings) — better3.0 (7 ratings)
Positive reviews72.7% of reviews — better33.3% of reviews
Number of ratings10K — better7
Update frequencyEvery 3 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.69.3 — better
Further details — not scored
Size6 MB83 MB
Age rating4+4+
DeveloperBrachmann Online Marketing GmbH & Co. KGCompagnie des Montres Longines Francillon SA

Customer experience

Atomic Clock PRO

All ratings10,111 ratings
Positive92.3%
Neutral3.5%
Negative4.2%
Written reviews421 reviews
Positive72.7%
Neutral6.2%
Negative21.1%

Longines VHP GMT Flash Setting

All ratings7 ratings
Positive42.9%
Neutral14.3%
Negative42.9%
Written reviews27 reviews
Positive33.3%
Neutral7.4%
Negative59.3%

Bugs and requests

Atomic Clock PRO

Reported bugs

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

Requested features

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

Longines VHP GMT Flash Setting

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Atomic Clock PRO

Subscriptions1
  • Premium$1.991 Month
One-time1
  • Remove Ads$5.99
None

Longines VHP GMT Flash Setting

No in-app purchases

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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