Atomic Clock & Watch Accuracy

Contains adsIn-app purchases
16.2K 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
Mar 15, 2024

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

15.4K reviews
thomas cirillo
April 25, 2024
the atomic clock aspect works fine. but the watch accuracy tracking has a fundamental flaw. i records elapsed time, which is only useful for quartz and other always running watches. with automatic watches (i have a large collection) that are worn occassionally, it will incorrectly display accuracy as though the watch were running continuously. this is not useful and wrong. i've written to tom, the developer about this and about two bugs i've found but he has stopped answering me. too bad
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Matt Ladd
December 28, 2023
This is the perfect app for getting the time from the atomic clock and also tracking the time on you watches. It allows you to save data points across the life of your watches to determine their accuracy and when it's time for a service. This app is clean and simple. I have the pro version witch is totally worth it for the asking price. No adds or pop-ups. Well worth the lifetime fee.
4 people found this review helpful
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Joshua Thigpen
February 2, 2024
Ads popping up now take up half the screen; never used to be like this. Tried to minimize them and still ended up getting redirected to a random site I didn't want to go to, which runs the risk of being dangerous. I don't know if these vendors are scrupulous or not... never even heard of some of these brands so going to their sites, even on accident, is never recommended. This used to be my go-to app but I've uninstalled it because the invasive ads are simply unacceptable.
9 people found this review helpful
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Tomas Hubalek
February 13, 2024
Thanks for your feedback. We will take it into account while planning new releases. Also please note that you can get rid of ads for quite small price at Upgrade screen.

What's new

Release notes for version 2.0.x
- Collapsible ads can be displayed on main screen only since now. Will not be shown in nested screens. (version 2.0.7)
- Changed ads layout (version 2.0.6)
- Fixed logout related crash (version 2.0.5)
- Fixed rare crashes (version 2.0.4)
- Fixed another login issue related to backups (version 2.0.3)
- Fixed login issue related to backups (version 2.0.2)
- Upgraded to latest version of Google's payment solution (version 2.0.0)