Comparison

Atomic Clock PRO vs Flip 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

Flip Clock

Enhance your device with a classic flip clock display and customizable widgets. Stay focused with a built-in Pomodoro timer for work and study. Personalize your timekeeping experience with various themes and effects.

Highlights
  • Customizable flip clock widgets
  • Full-screen clock display
  • Pomodoro timer for focus
  • Floating clock over other apps
  • Multiple widget sizes
  • 12/24 hour format
Features
Read full description

Flip Clock is a classic desktop digital clock with smooth flip animations. Flip clock features a big digital clock display and real-time seconds, just like the iPhone clock. Flip Clock helps you stay productive and focused with a built-in Pomodoro timer for studying and working. The time app is simple, elegant, and powerful — making every second count! Flip Clock key Features: Custom Widgets: Your Flip Clock - Browse pre-designed digital clocks widget in our flip clock free. Customize your own time widget with the widget customizer. - Unlimited custom digital clocks widget by adding photos, choosing a style, editing fonts, colors, signatures, flip effects, and more. Flip Clock Digital Widgets - The home screen time widget lets you view the time and date in large size without opening the Flipclock app. - Flip Clock offers three size options to choose from. Flip Clock Full Screen Clock Display -Enable the free full-screen clock with seconds and switch between 12-hour and 24-hour formats.. - There are also a variety of digital clock themes available for customization. Flip Clock Pomodoro Timer - The pomodoro timer helps you stay focused at work and study. - Pomodoro clock each 25-minute countdown period of concentration will leave no room for distraction. Flip Clock Floating Clock - The Floating Clock stays visible over other apps, allowing you to check the time anytime—ideal for studying, working, or keeping your screen stylish and organized. Time is precious, and with our widget clock, you'll always stay on track. We can open the flip clock widget app and use it on iPhone. What are you waiting for? Download and experience flip clock app now!!! Feedback — If you like Digital Flip Clock Widgets, please rate it 5 stars and give us a good review. — If you have any suggestions or usage questions, please email shenguangyuanhk@163.com Note: If you subscribe via Apple, payment will be charged to App Store Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Account will be charged for renewal within 24 hours prior to the end of the current period at the rate of the selected plan. Subscriptions and auto-renewal may be managed by going to App Store Account Settings after purchase. Privacy Policy:https://clock.aifontkeyboard.xyz/privacy.html User Agreement:https://clock.aifontkeyboard.xyz/terms.html

Screenshots

Atomic Clock PRO4 screens
Flip Clock4 screens

Verdict

The call

The clearest difference is rating: Atomic Clock PRO at 4.7 against Flip Clock's 3.5. Atomic Clock PRO also leads on ratings volume (10K vs 11) and review sentiment (73% vs 63%). Flip Clock's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 3 months). On price, in-app purchases, monetization model 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 and Flip Clock sells 7 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Atomic Clock PRO holds the better App Store score, 4.7 against 3.5. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 73% of Atomic Clock PRO's written reviews are positive against 63% of Flip Clock's.

UpkeepUpdate frequency

Atomic Clock PRO ships an update every 3 months, Flip Clock every 2 weeks. The most recent releases landed on October 2, 2026 and September 27, 2026 respectively.

Scorecard5 real differences · 5 level
Atomic Clock PRO versus Flip Clock: the parameters behind the verdict, then further details
ParameterAtomic Clock PROFlip Clock
PriceFreeFree
Rating4.7 (10K ratings) — better3.5 (11 ratings)
Positive reviews72.9% of reviews — better62.5% of reviews
Number of ratings10K — better11
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.6
Further details — not scored
Size6 MB310 MB
Age rating4+4+
DeveloperBrachmann Online Marketing GmbH & Co. KGHK SHENGUANGYUAN TECH LIMITED

Customer experience

Atomic Clock PRO

All ratings10,111 ratings
Positive92.3%
Neutral3.5%
Negative4.2%
Written reviews421 reviews
Positive72.9%
Neutral5.9%
Negative21.1%

Flip Clock

All ratings11 ratings
Positive63.6%
Neutral0.0%
Negative36.4%
Written reviews8 reviews
Positive62.5%
Neutral0.0%
Negative37.5%

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

Flip Clock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Atomic Clock PRO

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

Flip Clock

Subscriptions7
  • Week(1 Week)$0.997 Days
  • Week(1 Week)$4.997 Days
  • Week Plan(1 Week)$14.997 Days
Show 4 more
  • Week(1 Week)3 Days trial$14.997 Days
  • Week Plan(1 Week)3 Days trial7 variants$14.997 Days
  • Month Plan(1 Month)$19.991 Month
  • Annual Plan(1 Year)$69.991 Year

Questions

Is Atomic Clock PRO free?
Atomic Clock PRO is free to download, with in-app purchases available.
Is Flip Clock free?
Flip Clock is free to download, with in-app purchases available.
Which has better reviews, Atomic Clock PRO or Flip Clock?
Atomic Clock PRO is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while Flip Clock averages 3.5 from 11 ratings.
Do Atomic Clock PRO or Flip Clock have ads?
Atomic Clock PRO shows ads; Flip Clock does not.
Which is updated more often, Atomic Clock PRO or Flip Clock?
Atomic Clock PRO ships an update every 3 months, and Flip Clock every 2 weeks. Most recently, Atomic Clock PRO was updated on October 2, 2026 and Flip Clock on September 27, 2026.

Other comparisons