Time Calibrator vs Radio Wave Sync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time Calibrator
This utility app provides precise local time and date information by connecting to an atomic clock server in Switzerland. It utilizes quantum technology to transmit this data at the speed of light directly to compatible i-Atomic watches.
- Accurate global time and date
- Connects to Swiss atomic clock server
- Quantum technology data transmission
- Direct communication to i-Atomic watches
- Light signal synchronization
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This app is designed for i-Atomic watches users Welcome to Time Calibrator! Time Calibrator has been specifically designed to deliver accurate time information to people all around the globe. The app connects automatically to the atomic clock server in Switzerland to display the exact local time and date. Through quantum technology, the information travels at the speed of light from the NTP server and is communicated directly to AtomTime i-Atomic watches via light signals.
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
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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 rating: Radio Wave Sync at 4.5 against Time Calibrator's 2.7. Radio Wave Sync also leads on review sentiment (61% vs 33%) and ratings volume (1.1K vs 3). Time Calibrator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price 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
Both are free to download. Radio Wave Sync sells 1 one-off in-app purchase. Time Calibrator asks for nothing beyond the download.
Radio Wave Sync holds the better App Store score, 4.5 against 2.7. That said, the two scores are not equally well evidenced: Radio Wave Sync has 1.1K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of Time Calibrator's written reviews are positive against 61% of Radio Wave Sync's.
Time Calibrator ships an update every 8 months, Radio Wave Sync every 2 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.
| Parameter | Time Calibrator | Radio Wave Sync |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) | 4.5 (1.1K ratings) — better |
| Positive reviews | 33.3% of reviews | 61.4% of reviews — better |
| Number of ratings | 3 | 1.1K — better |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Atomtime Suisse S.A. | Kunshan Nianyueri Information Technology Co., Ltd. |
Customer experience
Time Calibrator
Radio Wave Sync
Bugs and requests
Time Calibrator
Not enough reviews yet to summarise bugs or requests.
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
Time Calibrator
No in-app purchases
Radio Wave Sync
- Pro Editon$1.99
Questions
Is Time Calibrator free?
Is Radio Wave Sync free?
Which has better reviews, Time Calibrator or Radio Wave Sync?
Do Time Calibrator or Radio Wave Sync have ads?
Which is updated more often, Time Calibrator or Radio Wave Sync?
Other comparisons
