Comparison

Atomic Clock PRO vs Fullscreen 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

Get the most accurate time from an official atomic clock server. This app automatically detects your time zone and allows custom backgrounds. Easily switch between digital and analog clock displays with a swipe.

Highlights
  • Exact time from atomic clock
  • Automatic time zone recognition
  • Customizable background images
  • Digital and analog clock modes
  • Optional sound alerts
  • Color customization
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

Fullscreen Clock

Transform your device into a stylish flip clock that doubles as a productivity tool. Enhance your workspace with aesthetic widgets and utilize the integrated focus timer for improved concentration during study or work sessions.

Highlights
  • Iconic flip clock animation
  • Deep focus timer (Pomodoro/custom)
  • Stunning home screen widgets
  • Elegant and minimalist interface
  • Extensive customization options
  • Versatile timers and stopwatch
  • Floating clock for iPadOS
Features
Read full description

It's not just a clock. It's a statement piece. Transform your device into a stunning Flip Clock, the perfect centerpiece for your desk setup. More than just aesthetics, it's a powerful tool designed to help you focus, study, and seize every second. BEAUTY MEETS PRODUCTIVITY We believe your most personal device deserves more than a boring clock. Fullscreen Clock combines minimalist design with powerful productivity features to create an experience that is both beautiful and functional. ICONIC FLIP CLOCK: Enjoy the satisfying, classic animation of a retro flip clock, reborn with a modern, clean design. It's the ultimate accessory for your Gong-stagram study sessions and aesthetic workspace photos. DEEP FOCUS TIMER: Crush your goals with our integrated focus timer. Use the Pomodoro Technique or set custom sessions to improve concentration during study, work, or meditation. STUNNING WIDGETS: Your clock shouldn't be trapped inside an app. Add our beautifully designed widgets to your Home Screen for an instant, stylish time check. FEATURES YOU'LL LOVE: Elegant & Minimalist Interface: A clean, distraction-free design that puts the focus on time. Extensive Customization: Personalize your clock with different themes, sizes, and even your own background photos. Versatile Timers & Stopwatch: From a simple countdown to a precision stopwatch, we have all your timing needs covered. Floating Clock (iPadOS): Keep track of time with a clock that floats above your other apps – perfect for multitasking.

Screenshots

Atomic Clock PRO4 screens
Fullscreen Clock4 screens

Verdict

The call

The clearest difference is update cadence: Fullscreen Clock at every 8 days against Atomic Clock PRO's every 3 months. Atomic Clock PRO's advantage is ratings volume (10K vs 2.2K). On price, rating, review sentiment and ads 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 and Fullscreen Clock sells 1 one-off in-app purchase. 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 — 4.7 for Atomic Clock PRO against 4.7 for Fullscreen Clock. Both are backed by a comparable volume of ratings — 10K and 2.2K respectively. Written reviews are what separate them: 73% of Atomic Clock PRO's written reviews are positive against 76% of Fullscreen Clock's.

UpkeepUpdate frequency

Atomic Clock PRO ships an update every 3 months, Fullscreen Clock every 8 days. Both last shipped on September 30, 2026.

Scorecard2 real differences · 8 level
Atomic Clock PRO versus Fullscreen Clock: the parameters behind the verdict, then further details
ParameterAtomic Clock PROFullscreen Clock
PriceFreeFree
Rating4.7 (10K ratings)4.7 (2.2K ratings)
Positive reviews72.7% of reviews75.9% of reviews — better
Number of ratings10K — better2.2K
Update frequencyEvery 3 monthsEvery 8 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size6 MB18 MB
Age rating4+4+
DeveloperBrachmann Online Marketing GmbH & Co. KGShenzhen Gude Aipu Technology Co., Ltd

Customer experience

Atomic Clock PRO

All ratings10,111 ratings
Positive92.3%
Neutral3.5%
Negative4.2%
Written reviews421 reviews
Positive72.7%
Neutral6.2%
Negative21.1%

Fullscreen Clock

All ratings2,175 ratings
Positive93.3%
Neutral2.7%
Negative4.0%
Written reviews245 reviews
Positive75.9%
Neutral8.6%
Negative15.5%

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

Fullscreen Clock

From 2.2K App Store ratings

What we love

  • 🚀 Efficient
  • 👍 Simple and useful
  • 👍 Great tool
  • 👍 Excellent app
  • 👍 Awesome clock

Room to improve

  • 🐛 Ads disrupt usage
  • 🐛 Buggy widget
  • 🔋 Drains battery
  • 👎 Hard to exit
  • 👎 Annoying ads

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

Fullscreen Clock

Reported bugs

4 issues
  • Widget doesn't adjust for DST
  • Clock resets when exiting app
  • Hangs up on some devices
  • Ads cover the clock

Requested features

5 requests
  • Add color customization
  • Integrate date display
  • Add 12-hour time format with AM/PM
  • Improve countdown timer functionality
  • Add stopwatch widget

In-app purchases

2 purchases

Atomic Clock PRO

Subscriptions1
  • Premium$1.991 Month
One-time1
  • Remove Ads$5.99
1 purchases

Fullscreen Clock

One-time1
  • VIP$2.99

Questions

Is Atomic Clock PRO free?
Atomic Clock PRO is free to download, with in-app purchases available.
Is Fullscreen Clock free?
Fullscreen Clock is free to download, with in-app purchases available.
Which has better reviews, Atomic Clock PRO or Fullscreen Clock?
Atomic Clock PRO and Fullscreen Clock are both rated 4.7 out of 5 on the App Store, from 10K and 2.2K ratings respectively.
Do Atomic Clock PRO or Fullscreen Clock have ads?
Both Atomic Clock PRO and Fullscreen Clock show ads.
Which is updated more often, Atomic Clock PRO or Fullscreen Clock?
Atomic Clock PRO ships an update every 3 months, and Fullscreen Clock every 8 days. Most recently, Atomic Clock PRO was updated on September 30, 2026 and Fullscreen Clock on September 30, 2026.

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