Atomic Clock & Watch Accuracy Tool (with NTP Time)

Contains adsIn-app purchases
13.5K reviews
Content rating
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

This app has two main features:
- it detects and shows exact time (via NTP protocol). It can be helpful if you want to sync time on some of your devices with atomic clock.
- it allows to track accuracy of your wristwatches. It can be helpful if you want to know how exact your wristwatch is. You can share this information with watchmaker and it helps him to adjust your watches properly.

Features in detail:

Atomic Time from NTP Servers
- Most accurate time on the earth is provides by Atomic clocks. To synchonize computer/phone clock with atomic clock you can use Network Time Protocol servers.
- This app is able to connect to NTP time servers and show you exact time
- There is list of NTP Time Servers (including goverment time servers like NIST Internet Time Service)
- On Android 8 you can use Picture-in-Picture function and adjust your clock according excact time shown in small window over other apps.

Watch accuracy tracking app
With this app you can
- track accuracy of your wristwatch collection (works well for both mechanical and quartz watches)
- simply tap in the app, let app know what time was shown on wristwatch and app will do all the statistics and show you watch accuracy chart
- share accuracy chart with your friends on social networks
- export your accuracy data as CSV for further processing

Free vs. paid functionality
- basic app functionality is for free. You can check exact time for free. You can track one of your watches for free.
- premium functionality is paid feature

Feel free to contact us if you find any bug and/or you want to suggest some improvement.
Updated on
Jul 21, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity, App info and performance, and Device or other IDs
This app may collect these data types
App activity, App info and performance, and Device or other IDs
Data is encrypted in transit
Data can’t be deleted
13.5K reviews
Victor Reategui
December 5, 2020
The watch is great. What I don't like is that after upgraded to remove the ads, which was removed, I have to pay to have for advance settings that includes color. After the second upgrade the app remained the same, no additional colors, no dark mode, just the same. Whatever you sell, if you are paid what you ask you have to deliver.
43 people found this review helpful
Did you find this helpful?
A Google user
February 17, 2020
It does just what it says. Has Atomic clock. Shows second hand making it easier to set a watch by. Also you can hit a button when your watch is on a particular time and it calculates the difference between atomic clock and your watch to gage accuracy. Lots of different options for paid version depending on what you want to use as far as options. Perhaps a bit price for an app, but it is refreshing to have an app that does not have adds.
40 people found this review helpful
Did you find this helpful?
bom 1830
September 2, 2020
Awesome App in many different formats. Had no idea that one is able to synch their watches with the app to test how well the watches keep time ie milliseconds, seconds, minutes of detailed analysis. That's a cool aspect of the app. Also reflects one electronic device(s) current time against the Atomic clock. Utilize this unique app more than I thought. Initially thought it was more of a gimmick but far from that. Impressed with the different features and capabilities of it.
34 people found this review helpful
Did you find this helpful?

What's new

- Added Japanese and Indonesian translation
- Fixed Picture-in-Picture mode issue