Comparison

AtomicClock vs World Clock. Time Widget

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

World Clock. Time Widget

This app offers a world clock with a time calculator and customizable widgets for your home screen. It allows you to track time in over 30,000 cities, even offline, and rename locations for easy identification. The clean interface ensures fast navigation and a straightforward user experience.

Highlights
  • 30,000+ cities
  • Offline functionality
  • Multiple home screen widgets
  • Time converter
  • Rename places
Features
Read full description

Our World Clock + Widgets goes beyond similar apps and iOS Clock App with the addition of a widget and the easy-to-use time calculator. It has a clean design that is straightforward for fast navigation. The app is free to download and has every option that makes it the perfect world clock. Features: • Choose from 30k cities • Use offline functionality • Add multiple Widgets on Home Screen • Adjust time with Time Converter • Rename your places Please note the subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period By using World Clock, you are agreeing to our Privacy Policy and Terms of Use: Private Policy http://getsfaxapp.com/privacy.html Terms of Use http://getfaxapp.com/terms.html Payment will be charged to iTunes Account at confirmation of purchase • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable

Screenshots

AtomicClock4 screens
World Clock. Time Widget4 screens

Verdict

The call

The clearest difference is ads: World Clock. Time Widget at none against AtomicClock's shown. World Clock. Time Widget also leads on iOS requirement (12.0 vs 17.4). AtomicClock's advantage is review sentiment (84% vs 64%) and update cadence (monthly vs every 3 months). On price, rating, ratings volume and in-app purchases 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 and World Clock. Time Widget sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for AtomicClock against 4.7 for World Clock. Time Widget. Both are backed by a comparable volume of ratings — 5.6K and 4.4K respectively. Written reviews are what separate them: 84% of AtomicClock's written reviews are positive against 64% of World Clock. Time Widget's.

UpkeepUpdate frequency

AtomicClock ships an update monthly, World Clock. Time Widget every 3 months. Both last shipped on November 6, 2026.

Scorecard4 real differences · 6 level
AtomicClock versus World Clock. Time Widget: the parameters behind the verdict, then further details
ParameterAtomicClockWorld Clock. Time Widget
PriceFreeFree
Rating4.8 (5.6K ratings) — better4.7 (4.4K ratings)
Positive reviews84.3% of reviews — better63.9% of reviews
Number of ratings5.6K — better4.4K
Update frequencyMonthly — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.412.0 — better
Further details — not scored
Size17 MB33 MB
Age rating4+4+
DeveloperTimo Partl7270356 Canada Inc

Customer experience

AtomicClock

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

World Clock. Time Widget

All ratings4,319 ratings
Positive92.2%
Neutral3.4%
Negative4.4%
Written reviews155 reviews
Positive63.9%
Neutral8.4%
Negative27.7%

User reviews

AtomicClock

From 5.6K App Store ratings

What we love

  • 🚀 Accurate time
  • 👍 Highly customizable
  • 🚀 Precise to the second
  • 👍 Easy to use
  • 👍 Helpful for setting watches

Room to improve

  • 🐛 Server connection issues
  • 🔍 Limited time zone options
  • 💰 Ads diminish clock view
  • 🔍 Lacks some advanced features
  • 🔍 Redundant for some users

World Clock. Time Widget

From 4.4K App Store ratings

What we love

  • 💻 Simple and easy to use
  • 🌍 Helpful for tracking time zones
  • 🕰️ Straightforward interface
  • 📊 Useful for international meetings
  • 🔍 Comprehensive city database

Room to improve

  • 🐛 Bugs and glitches in widget
  • 🔍 Missing some major cities
  • 🔒 Paid features behind paywall
  • 🔄 Difficulty reordering locations
  • 🕰️ Limited time display options

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

World Clock. Time Widget

Reported bugs

5 issues
  • Widget not loading correctly
  • Time zone display issues
  • Search function not working
  • Compatibility problems on iOS 16
  • Inconsistent date/day display

Requested features

5 requests
  • Add analog clock option
  • Ability to display seconds
  • More customization options
  • Improved widget functionality
  • Granular time zone selection

In-app purchases

1 purchases

AtomicClock

One-time1
  • Lifetime Pro Version$6.99
3 purchases

World Clock. Time Widget

Subscriptions2
  • World Clock. Widget. Monthly$1.991 Month
  • World Clock. Widget. Annually1 Month trial$15.991 Year
One-time1
  • Remove Ads$5.99

Questions

Is AtomicClock free?
AtomicClock is free to download, with in-app purchases available.
Is World Clock. Time Widget free?
World Clock. Time Widget is free to download, with in-app purchases available.
Which has better reviews, AtomicClock or World Clock. Time Widget?
AtomicClock is rated higher. AtomicClock averages 4.8 out of 5 from 5.6K ratings, while World Clock. Time Widget averages 4.7 from 4.4K ratings.
Do AtomicClock or World Clock. Time Widget have ads?
AtomicClock shows ads; World Clock. Time Widget does not.
Which is updated more often, AtomicClock or World Clock. Time Widget?
AtomicClock ships an update monthly, and World Clock. Time Widget every 3 months. Most recently, AtomicClock was updated on November 6, 2026 and World Clock. Time Widget on November 6, 2026.

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