Atomic Clock & Watch Accuracy

Contains adsIn-app purchases
15K reviews
Content rating
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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
Apr 5, 2023

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

Ratings and reviews

14.3K reviews
In Lee
April 28, 2023
Great app but seems to have a major bug. Very easy to use and clean interface but the app is rounding timings to the nearest whole second and only shows ".00" instead of the actual decimal while the video demo and screenshots on the Play store show actual decimals. If this bug is not fixed it would unfortunately be a fatal flaw for an accuracy obsessed watch nerd like me.
3 people found this review helpful
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February 26, 2023
26 Feb 23- Full paid version, which is $$$ for what it is. This app is one of the better ones avaliable. Easy to use and no need to wait for the seconds hand to get to zero, a great option which saves time for the end user. I'd recommend some different options with ordering of watches, such as listing the last time a watches accuracy was recorded, etc. As with all things, the app could always be better. Backup is easy to use, but only manual, not auto. I have not seen an update yet.
3 people found this review helpful
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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.
62 people found this review helpful
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What's new

Release notes for version 1.8.x
- Fixed rare crash (version 1.8.20)
- Fixed rare crash related to missing resources. (version 1.8.20)
- Fixed incorrect handling of discounted products (version 1.8.18)
- Fixed missing java.time.LocalDate class on older phones (version 1.8.16)
- Fixed bug when there was not possible to remove backup from the cloud. (version 1.8.13)
- Fixed bug related to sharing measurements as CSV (version 1.8.12)