Comparison

AtomicClock 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

AtomicClock

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
Read full description

Check precise NTP reference time at a glance. AtomicClock helps you set watches, wall clocks, cameras, and other devices, compare local time with UTC, and follow moments when every second matters. Clear analog and digital time AtomicClock displays current time from NTP servers that reference atomic clocks. Choose a predefined server or add your own, then view local or UTC time in a clean analog or digital clock. Customize your reference clock • Switch between 12-hour and 24-hour time • Customize the time format • Choose from multiple clock faces and hands • Use a smooth, fluid second hand • Add acoustic ticking or the Greenwich Time Signal • Tap the screen to hide information and controls, freeze the display, or mute ticking Details for precise time checks View technical NTP information, including round-trip time and server stratum. Whether you are checking a timestamp, preparing a camera, aligning a wall clock, or setting a watch by hand, the seconds remain clear and easy to follow. AtomicClock is free to use. AtomicClock Pro is available as a one-time purchase with no subscription. It unlocks your preferred clock face, hands, and font, removes ads, and includes upcoming Pro features. AtomicClock displays NTP reference time for comparison and does not change your device’s system time. Results can vary with the selected server, network conditions, and device behavior.

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

AtomicClock4 screens
Longines VHP GMT Flash Setting4 screens

Verdict

The call

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.

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard8 real differences · 2 level
AtomicClock versus Longines VHP GMT Flash Setting: the parameters behind the verdict, then further details
ParameterAtomicClockLongines VHP GMT Flash Setting
PriceFreeFree
Rating4.8 (5.5K ratings) — better3.0 (7 ratings)
Positive reviews84.2% of reviews — better33.3% of reviews
Number of ratings5.5K — better7
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.09.3 — better
Further details — not scored
Size17 MB83 MB
Age rating4+4+
DeveloperTimo PartlCompagnie des Montres Longines Francillon SA

Customer experience

AtomicClock

All ratings5,539 ratings
Positive96.5%
Neutral1.8%
Negative1.8%
Written reviews241 reviews
Positive84.2%
Neutral3.3%
Negative12.4%

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

AtomicClock

Reported bugs

3 issues
  • Crashes on certain iOS versions
  • Occasional freezing of hands
  • Countdown timer sound not working

Requested features

5 requests
  • 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

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

AtomicClock

One-time1
  • Lifetime Pro Version$6.99
None

Longines VHP GMT Flash Setting

No in-app purchases

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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