Comparison

Unix Time UTC vs AtomicClock

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

Head to head
About

Unix Time UTC

This utility app displays the current time from the Unix epoch, along with UTC time, network time, and device time in your detected timezone. It also calculates and shows any time drift on your device.

Highlights
  • Unix epoch time display
  • Current UTC time
  • Network time UTC
  • Device time in detected timezone
  • Time drift calculation
Features
Read full description

Unix Time UTC is a clock for developers showing the current time on device from the Unix epoch (1970-01-01 00:00:00 UTC). The bonus is that you also get the UTC time, the current network time UTC and your device time in the detected timezone. It will calculate the time drift for your device too. So, if you ever suspected that your clock is off, this will tell you how far.

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.

Screenshots

Unix Time UTC1 screens
AtomicClock4 screens

Verdict

The call

The clearest difference is rating: AtomicClock at 4.8 against Unix Time UTC's 3.4. AtomicClock also leads on ratings volume (5.6K vs 5) and review sentiment (84% vs 67%). Unix Time UTC'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. Unix Time UTC asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AtomicClock holds the better App Store score, 4.8 against 3.4. That said, the two scores are not equally well evidenced: AtomicClock has 5.6K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 67% of Unix Time UTC's written reviews are positive against 84% of AtomicClock's.

Scorecard7 real differences · 3 level
Unix Time UTC versus AtomicClock: the parameters behind the verdict, then further details
ParameterUnix Time UTCAtomicClock
PriceFreeFree
Rating3.4 (5 ratings)4.8 (5.6K ratings) — better
Positive reviews66.7% of reviews84.3% of reviews — better
Number of ratings55.6K — better
Update frequency—Monthly
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS10.0 — better17.4
Further details — not scored
Size24 MB17 MB
Age rating4+4+
DeveloperMark SlemkoTimo Partl

Customer experience

Unix Time UTC

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

AtomicClock

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

Bugs and requests

Unix Time UTC

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

Unix Time UTC

No in-app purchases

1 purchases

AtomicClock

One-time1
  • Lifetime Pro Version$6.99

Questions

Is Unix Time UTC free?
Unix Time UTC is free to download, with no in-app purchases.
Is AtomicClock free?
AtomicClock is free to download, with in-app purchases available.
Which has better reviews, Unix Time UTC or AtomicClock?
AtomicClock is rated higher. Unix Time UTC averages 3.4 out of 5 from 5 ratings, while AtomicClock averages 4.8 from 5.6K ratings.
Do Unix Time UTC or AtomicClock have ads?
AtomicClock shows ads; Unix Time UTC does not.

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