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Atomic Clock & Watch Accuracy - Time Sync & Watch Tracking

Sync your devices with exact atomic time & track wristwatch accuracy effortlessly for optimal performance.

Atomic Clock & Watch Accuracy
  • 2.0.9 Version
  • 3.3 Score
  • 215K+ Downloads
  • In-app purchases License
  • 3+ Content Rating
Download Android APK (9.66 MB)
Old Versions
Atomic Clock & Watch Accuracy Atomic Clock & Watch Accuracy Atomic Clock & Watch Accuracy Atomic Clock & Watch Accuracy
CONS

Invasive ads in the free version

Issues with time syncing reliability

Limited options for NTP server selection

Lacks offline functionality

Difficulties in deleting incorrect measurements

Constant prompts for app reviews

Requires payment for advanced features

Rounding of timings to whole seconds only

Not all functionalities work seamlessly across devices

This application comes with two primary functionalities:

- It identifies and displays the precise time using the NTP protocol. This feature is particularly useful for synchronizing your devices' clocks with an atomic clock.

- It allows you to monitor the precision of your wristwatches. This is beneficial if you wish to understand how accurate your watch is, enabling you to share this information with a watchmaker for proper adjustments.

Atomic Clock & Watch Accuracy

Detailed Features:

Atomic Time via NTP Servers

- The most reliable time on the planet is delivered by atomic clocks. You can synchronize your computer or phone's time with these atomic clocks using Network Time Protocol servers.

- This application connects to NTP time servers to provide you with the exact time.

- A list of NTP Time Servers is provided, including government-operated time services.

- On devices running Android 8, you can utilize the Picture-in-Picture feature, allowing you to set your clock according to the accurate time displayed in a small overlay while using other apps.

Watch Accuracy Tracker

Using this app, you can

- monitor the accuracy of your wristwatch collection (suitable for both mechanical and quartz models)

- easily input the time shown on your wristwatch, after which the app will calculate the statistics and generate an accuracy chart for your watch

- share the accuracy chart with friends on social media platforms

- export your accuracy data in CSV format for additional processing

Free vs. Premium Features

- The basic version of the app offers free functionality, allowing you to check the exact time at no cost and track one of your watches without charge.

- Accessing premium features requires a payment.

Target Audience

- Users who need **precise time synchronization and device time calibration**

- **Watch enthusiasts, mechanical/quartz watch wearers**

- People who want to **test the accuracy of their watches**

- Users who need to **provide error data for watch repairers**

- Professional users who require high time accuracy**

FAQs

### 1. What are the core functions of this app?

There are two core functions: one is to obtain and display precise time using the NTP protocol, helping devices synchronize with atomic clocks; the other is to monitor watch accuracy, making it easy to understand the accuracy of your watch and providing a reference for watch repairers to make adjustments.

### 2. Which NTP servers can be connected to for time synchronization?

The app provides a list of NTP servers, including government-operated time services. These servers offer high time accuracy and stability, ensuring accurate synchronization.

### 3. What special features does this app offer for Android 8 devices?

It supports picture-in-picture. When enabled, the precise time appears as a small window floating over other apps, allowing you to check the time and adjust your device's clock at any time without switching apps. It's very convenient.

### 4. When monitoring watch accuracy, can I export or share the data?

Yes. After entering the watch's displayed time, the app generates an accuracy chart that can be shared on social media platforms. Accuracy data can also be exported in CSV format for later processing or for sharing with professionals.

### 5. What are the main differences between the free and paid versions?

The free version allows you to check the exact time and monitor one watch for free. Paying to unlock advanced features typically increases the number of watches you can use and may also provide more specialized analysis capabilities.

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Information
  • Version2.0.9
  • UpdateSep 29, 2026
  • DeveloperTomas Hubalek
  • CategoryTools
  • Requires AndroidAndroid 5.0+
  • Downloads215K+
  • Package Namenet.hubalek.android.apps.atomic_clock_watch_accuracy_tool
  • Signaturebbe0934a313565c0374dd552c8a74da3
  • Available on
  • ReportFlag as inappropriate
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User Reviews
3.3 9 Reviews
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  • Mr Jones
    Mr Jones

    The app works great. It really does. But there’s this nag screen about reviews that gets on my nerves. It pops up based on days since the last request, not how often I actually open the app. When I use it only occasionally, I end up seeing that nag every single time. Even after leaving a review, it still shows up. It’s frustrating.

  • Harry Grier
    Harry Grier

    Ads are everywhere now, taking up half the screen. It didn't used to be this way. I tried to minimize them but ended up getting directed to random sites instead, which can be risky. Who knows if these vendors are trustworthy? Some brands are completely unfamiliar. Accidentally visiting their sites feels like a bad idea. This app used to be my favorite, but I had to uninstall it because those intrusive ads crossed the line.

  • Henry R
    Henry R

    There’s this app that shows how your device's clock compares to the atomic clock. It can even sync fancy watches. I downloaded it to check my internal network clocks. Not a lot of features for that purpose, but at least I know my phone is synced with their clock source.

  • Pete Dinnella
    Pete Dinnella

    I love this app! It shows the Sprint phone network is running slow by 2 minutes. I sync all my clocks with the Atomic Clock App. I plan to tell all my Amateur Radio friends about it. Accurate time is crucial for our radio gear. Keep it up! Thanks a lot!

  • Dee Jay
    Dee Jay

    A fantastic companion for my watch! I picked it up without knowing how accurate it really was. This app showed me that what I thought was off was actually normal and even impressive. It lets me keep track of my watch's performance based on time, temperature, and surroundings. Overall, I'm really happy with it. Big thanks!

  • Jeff Baker
    Jeff Baker

    This app is fantastic! The 10-second alert before the alarm rings makes a big difference. It's super helpful. I think it would be great to have options for multiple alarms, like 5, 10, or even 15 minutes. Just a thought. Overall, I absolutely love this Atomic Clock!

  • Sergio Espinoza
    Sergio Espinoza

    This app keeps my watch collection perfectly timed. No more relying on satellite watches. I even discovered that my phone's time is inaccurate! I love it so much; I upgraded to the all-inclusive Platinum Pro version. UPDATE: Developers, please make the "RECORD TIME" button in the "New measurement" screen bigger and round. Sometimes, while focusing on the SEC hand of my watches, I miss tapping the small button currently there.

  • Howard Ledden
    Howard Ledden

    I paid for the full version, but I ran into a bug. When I add another watch, it doesn't calculate the time difference for the first watch. The first watch has over ten readings, and the second only has two. Both watches say the time can't be calculated. I reached out to the developer for a fix and I’ll update my review later. Also, I can't delete a time if there’s only one time in the series. That’s frustrating.

  • steven greenland
    steven greenland

    I just discovered this amazing app. It syncs with watches to test their timekeeping accuracy. You can get down to milliseconds and seconds. Such detailed analysis! The app also compares the current time of your device against an Atomic clock. I use this app way more than I expected. At first, I thought it was just a gimmick. Turns out, it’s packed with cool features and capabilities. I'm genuinely impressed!

Security Status
Clean

It’s extremely likely that this software program is clean.

What does this mean?

We have scanned the file and URLs associated with this software program in more than 50 of the world's leading antivirus services; no possible threat has been detected.

  • Name: Atomic Clock & Watch Accuracy
  • Package Name: net.hubalek.android.apps.atomic_clock_watch_accuracy_tool
  • Signature: bbe0934a313565c0374dd552c8a74da3