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.
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.
- Atomic clock time synchronization
- Digital and analog display options
- Customizable backgrounds
- Adjustable clock size
- Automatic time zone recognition
- Screen always on option
Read full descriptionHide 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/
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.
- 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
Read full descriptionHide 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
Verdict
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
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.
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.
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.
| Parameter | Atomic Clock PRO | Radio Wave Sync |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (10K ratings) — better | 4.5 (1.1K ratings) |
| Positive reviews | 72.9% of reviews — better | 61.4% of reviews |
| Number of ratings | 10K — better | 1.1K |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Brachmann Online Marketing GmbH & Co. KG | 宁 金 |
Customer experience
Atomic Clock PRO
Radio Wave Sync
User reviews
Atomic Clock PRO
From 10K App Store ratingsWhat 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 ratingsWhat 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
Atomic Clock PRO
- Premium$1.991 Month
- Remove Ads$5.99
Radio Wave Sync
- Pro Editon$1.99
Questions
Is Atomic Clock PRO free?
Is Radio Wave Sync free?
Which has better reviews, Atomic Clock PRO or Radio Wave Sync?
Do Atomic Clock PRO or Radio Wave Sync have ads?
Which is updated more often, Atomic Clock PRO or Radio Wave Sync?
Other comparisons















