Comparison

Atomic Clock PRO vs World Clock

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

This app provides highly accurate time by syncing with official atomic clock servers. Customize your display with digital or analog views, personal backgrounds, and adjustable sizes. It's perfect for precise timekeeping, travel, or as a personalized desk clock.

Highlights
  • Atomic clock time synchronization
  • Digital and analog display options
  • Customizable backgrounds
  • Adjustable clock size
  • Automatic time zone recognition
  • Screen always on option
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

World Clock

Easily compare world times and convert dates and times across different cities and time zones. Ideal for international meetings, travel, or staying connected with loved ones abroad. Offers widgets for quick access and customizable themes.

Highlights
  • Compare multiple cities and time zones
  • Convert dates and times across regions
  • Check UTC and standard time zones
  • Add widgets for fast world time checks
  • See day and night indicators
  • Choose 12-hour or 24-hour format
  • Select from multiple theme colors
Features
Read full description

Need to know the right time in another city before you call, travel, or schedule a meeting? World Clock-Timezone Converter helps you compare world times and convert any date and time across cities, UTC, and standard time zones. Add the places you care about, check the current time at a glance, or choose a future date to see what that time becomes around the world. It is useful for international meetings, remote teams, family abroad, travel plans, and friends in different time zones. Use widgets for quick access, switch between 12-hour and 24-hour time, check UTC and standard time zones, and choose a theme that fits your phone. Features: - Compare multiple cities and time zones in one list - Convert dates and times across regions - Check UTC, GMT, Zulu time, and standard time zones - Add widgets for fast world time checks - Search many cities and time zone entries - See day and night indicators - Use 12-hour or 24-hour time format - Choose from multiple theme colors - Free to use If you have feedback or need a location added, contact us at appsupport@bokeriastudio.com.

Screenshots

Atomic Clock PRO4 screens
World Clock4 screens

Verdict

The call

The clearest difference is in-app purchases: World Clock at none against Atomic Clock PRO's 2. World Clock also leads on update cadence (monthly vs every 4 months) and review sentiment (87% vs 73%). Atomic Clock PRO's advantage is ratings volume (10K vs 600). On price, rating, ads 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. World Clock asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Atomic Clock PRO against 4.8 for World Clock. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 600, so its average is the more settled of the two. Written reviews are what separate them: 73% of Atomic Clock PRO's written reviews are positive against 87% of World Clock's.

UpkeepUpdate frequency

Atomic Clock PRO ships an update every 4 months, World Clock monthly. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

Scorecard5 real differences · 5 level
Atomic Clock PRO versus World Clock: the parameters behind the verdict, then further details
ParameterAtomic Clock PROWorld Clock
PriceFreeFree
Rating4.7 (10K ratings)4.8 (600 ratings) — better
Positive reviews72.9% of reviews86.7% of reviews — better
Number of ratings10K — better600
Update frequencyEvery 4 monthsMonthly — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size6 MB34 MB
Age rating4+4+
DeveloperBrachmann Online Marketing GmbH & Co. KGBokeria

Customer experience

Atomic Clock PRO

All ratings10,230 ratings
Positive92.3%
Neutral3.5%
Negative4.2%
Written reviews425 reviews
Positive72.9%
Neutral5.9%
Negative21.2%

World Clock

All ratings600 ratings
Positive94.5%
Neutral2.5%
Negative3.0%
Written reviews45 reviews
Positive86.7%
Neutral2.2%
Negative11.1%

User reviews

Atomic Clock PRO

From 10K App Store ratings

What we love

  • ⭐ Accurate time display
  • 📟 Useful for timing events
  • 🕰️ Helpful for setting other clocks
  • 🔍 Large, easy-to-read clock face

Room to improve

  • 💸 Subscription model for ad-free version
  • 📢 Excessive advertisements
  • 🔍 Small font for seconds display
  • 🔀 Difficulty in displaying both analog and digital clocks simultaneously

World Clock

From 600 App Store ratings

What we love

  • 👍 Simple and intuitive user interface
  • 🆓 Free application with no paywall
  • 🌍 Comprehensive timezone and city database
  • ⚡ Fast app performance and quick load times
  • 🔄 Automatic daylight saving time updates

Room to improve

  • 🐛 Widget displays incorrect or blank times
  • 🐛 Time display stuck or frozen
  • ⚠️ Daylight saving time handling issues
  • 🐛 Night mode compatibility problems
  • 🐛 Screen flickering when scrolling

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

World Clock

Reported bugs

9 issues
  • Widget showing blank screen instead of times
  • Widget time display stuck or frozen
  • Incorrect time display after daylight saving changes
  • Widget not working on night mode
  • Screen flickering when scrolling
Show 4 more
  • Widget configuration not saving properly
  • Date/time truncation in location field
  • Widget disappeared after recent update
  • Widget not displaying multiple cities

Requested features

12 requests
  • Alarm functionality for multiple timezones
  • Larger widget size options (2x2, 3x3)
  • Widget theme/color customization
  • Seconds display in time
  • Real-time minute updates
Show 7 more
  • Reorderable timezone list
  • Reverse time conversion capability
  • MacBook/desktop version
  • Ad-free premium version
  • Better widget transparency controls
  • Improved widget design and modernization
  • Day of week display in custom widgets

In-app purchases

2 purchases

Atomic Clock PRO

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

World Clock

No in-app purchases

Questions

Is Atomic Clock PRO free?
Atomic Clock PRO is free to download, with in-app purchases available.
Is World Clock free?
World Clock is free to download, with no in-app purchases.
Which has better reviews, Atomic Clock PRO or World Clock?
World Clock is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while World Clock averages 4.8 from 600 ratings.
Do Atomic Clock PRO or World Clock have ads?
Both Atomic Clock PRO and World Clock show ads.
Which is updated more often, Atomic Clock PRO or World Clock?
Atomic Clock PRO ships an update every 4 months, and World Clock monthly. Most recently, Atomic Clock PRO was updated on November 1, 2026 and World Clock on October 29, 2026.

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