Comparison

AtomicClock vs Epoch Time Converter

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

Epoch Time Converter

Easily convert between epoch time and traditional date/time formats. This utility also provides a live, second-by-second display of the current epoch time. It's a straightforward tool for anyone needing to work with Unix timestamps.

Highlights
  • Epoch time to traditional time conversion
  • Traditional time to epoch time conversion
  • Live second-by-second epoch time display
  • Simple and intuitive interface
Features
Read full description

Epoch Time Converter is a simple app that converts epoch time to traditional time and vise versa. You can also utilize this app to view live second by second epoch time.

Screenshots

AtomicClock4 screens
Epoch Time Converter3 screens

Verdict

The call

The clearest difference is in-app purchases: Epoch Time Converter at none against AtomicClock's 1. Epoch Time Converter also leads on ads (none vs shown) and review sentiment (100% vs 84%). AtomicClock's advantage is update cadence (monthly vs every 15 months) and ratings volume (5.6K vs 6). On price, device support and iOS requirement 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. Epoch Time Converter asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AtomicClock holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: AtomicClock has 5.6K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 84% of AtomicClock's written reviews are positive against 100% of Epoch Time Converter's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

AtomicClock ships an update monthly, Epoch Time Converter every 15 months. Both last shipped on October 26, 2026.

Scorecard7 real differences · 3 level
AtomicClock versus Epoch Time Converter: the parameters behind the verdict, then further details
ParameterAtomicClockEpoch Time Converter
PriceFreeFree
Rating4.8 (5.6K ratings) — better4.5 (6 ratings)
Positive reviews84.3% of reviews100.0% of reviews — better
Number of ratings5.6K — better6
Update frequencyMonthly — betterEvery 15 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.4 — better18
Further details — not scored
Size17 MB4 MB
Age rating4+4+
DeveloperTimo Partlcorey smith

Customer experience

AtomicClock

All ratings5,568 ratings
Positive96.5%
Neutral1.7%
Negative1.8%
Written reviews242 reviews
Positive84.3%
Neutral3.3%
Negative12.4%

Epoch Time Converter

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Epoch Time Converter

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

AtomicClock

One-time1
  • Lifetime Pro Version$6.99
None

Epoch Time Converter

No in-app purchases

Questions

Is AtomicClock free?
AtomicClock is free to download, with in-app purchases available.
Is Epoch Time Converter free?
Epoch Time Converter is free to download, with no in-app purchases.
Which has better reviews, AtomicClock or Epoch Time Converter?
AtomicClock is rated higher. AtomicClock averages 4.8 out of 5 from 5.6K ratings, while Epoch Time Converter averages 4.5 from 6 ratings.
Do AtomicClock or Epoch Time Converter have ads?
AtomicClock shows ads; Epoch Time Converter does not.
Which is updated more often, AtomicClock or Epoch Time Converter?
AtomicClock ships an update monthly, and Epoch Time Converter every 15 months. Most recently, AtomicClock was updated on October 26, 2026 and Epoch Time Converter on October 26, 2026.

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