Comparison

Atomic Clock PRO vs Radio Wave Sync

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

Radio Wave Sync

This app helps synchronize radio-controlled watches by simulating time signal waves. It supports various international time signal standards and offers a 'Beast Mode' for faster synchronization. Simply place your watch near your device's speaker and start the process.

Highlights
  • Simulates international time wave signals
  • Supports China, USA, Japan, Germany, and UK signals
  • Unique 'Beast Mode' for faster sync
  • Manual wave receiving mode calibration
  • Adjustable volume for optimal signal
Features
Read full description

I have a Casio G-Series radio watch, but it is always unable to receive radio waves from time signal station, so I started to write an application to solve this problem. After some research, I finally wrote this application, which can perfectly simulate the timing signal and happily calibrate the time. Usage method: 1. Adjust the volume of iPhone / iPad to the maximum. 2. Switch the radio controlled watch / clock to manual wave receiving mode. 3. Click the "start" button. 4. Place the watch / clock near the iPhone / iPad speakers. 5. The synchronization process generally takes 3-10 minutes, please wait patiently. Matters needing attention: 1. Please try to use the software in a quiet environment to avoid signal interference. 2. The volume of the mobile phone must be adjusted to the maximum. It's too small and the effect is not good. Characteristic: 1. Supports simulation of all types of Time Wave Signal: * China BPC * USA WWVB * Japan JJY40 / JJY60 * Germany DCF77 * British MSF 2. The unique "Beast Mode" provides higher frequency simulation signals and faster sync. Contact information: Please contact me if you have any use questions *QQ: 3364918353 *Email: 3364918353@qq.com

Screenshots

Atomic Clock PRO4 screens
Radio Wave Sync3 screens

Verdict

The call

The clearest difference is ratings volume: Atomic Clock PRO at 10K against Radio Wave Sync's 1.1K. Atomic Clock PRO also leads on review sentiment (73% vs 61%). Radio Wave Sync's advantage is iOS requirement (13.0 vs 15.6). On price, rating, update cadence 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 Radio Wave Sync 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

Atomic Clock PRO holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Atomic Clock PRO has 10K ratings behind it against 1.1K, 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 61% of Radio Wave Sync's.

UpkeepUpdate frequency

Atomic Clock PRO ships an update every 4 months, Radio Wave Sync every 2 months. The most recent releases landed on November 14, 2026 and November 13, 2026 respectively.

Scorecard3 real differences · 7 level
Atomic Clock PRO versus Radio Wave Sync: the parameters behind the verdict, then further details
ParameterAtomic Clock PRORadio Wave Sync
PriceFreeFree
Rating4.7 (10K ratings) — better4.5 (1.1K ratings)
Positive reviews72.9% of reviews — better61.4% of reviews
Number of ratings10K — better1.1K
Update frequencyEvery 4 monthsEvery 2 months — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size6 MB15 MB
Age rating4+4+
DeveloperBrachmann Online Marketing GmbH & Co. KG宁 金

Customer experience

Atomic Clock PRO

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

Radio Wave Sync

All ratings1,049 ratings
Positive87.4%
Neutral2.1%
Negative10.5%
Written reviews324 reviews
Positive61.4%
Neutral2.8%
Negative35.8%

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

Radio Wave Sync

From 1.1K App Store ratings

What we love

  • 🚀 Works as intended
  • 👍 Easy to use
  • 💡 Innovative solution
  • 🔒 Reliable sync
  • ⏱️ Fast sync time

Room to improve

  • 🐛 Inconsistent performance
  • 💰 Paid version required
  • 🔇 Audio issues
  • 🤖 Ads in paid version
  • 🔁 One-time use only

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

Radio Wave Sync

Reported bugs

3 issues
  • No sound output
  • Sync failure after initial success
  • Incompatibility with certain watch models

Requested features

3 requests
  • Time zone offset option
  • Compatibility with newer devices
  • Improved reliability and consistency

In-app purchases

2 purchases

Atomic Clock PRO

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

Radio Wave Sync

One-time1
  • Pro Editon$1.99

Questions

Is Atomic Clock PRO free?
Atomic Clock PRO is free to download, with in-app purchases available.
Is Radio Wave Sync free?
Radio Wave Sync is free to download, with in-app purchases available.
Which has better reviews, Atomic Clock PRO or Radio Wave Sync?
Atomic Clock PRO is rated higher. Atomic Clock PRO averages 4.7 out of 5 from 10K ratings, while Radio Wave Sync averages 4.5 from 1.1K ratings.
Do Atomic Clock PRO or Radio Wave Sync have ads?
Both Atomic Clock PRO and Radio Wave Sync show ads.
Which is updated more often, Atomic Clock PRO or Radio Wave Sync?
Atomic Clock PRO ships an update every 4 months, and Radio Wave Sync every 2 months. Most recently, Atomic Clock PRO was updated on November 14, 2026 and Radio Wave Sync on November 13, 2026.

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