Published by MSA Creativ

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About Atomic Clock - US NIST Time

1. A New Year's Eve Countdown function is also available. * Time Snapshot = Display snapshot of current atomic time, which is useful to set other watches and clocks.

2. This app shows the exact actual time provided by several US NTP servers, based on atomic clocks.

3. Additionally, the deviation of the device clock from the exact atomic time is shown.

4. The active app resides on top of the screen to be used as typical clock, e. g. to check the time regularly during meetings.

5. Date and time zone (based on the device setting) are provided as well.

6. All this with one single click!

7. You can choose between different background colors and images. 3 different US NTP time servers (operated by NIST - National Institute of Standards and Technology) are contacted via network.

Atomic Clock Customer Insights

1. Developer says app can't set android tine so why the synchronize button? It's a fake app.This is the best Atomic Clock app ! Great audio clock tick emulation, highly accurate,simple layout, no delay or lag on the seconds tick, it just plain works ! Thank you !I want to hear the alternating ticking sounds as well as the time stamp called out every minute, like what i used to hear on my shortwave radio.

2. 5 stars soon as an audio option like that exists!National bureau of standards wwv shortwave radio broadcast highly accurate yet due to the internet those not having shortwave radios or satellite receiving wrist watches clocks etc can by this internet appt keep up with accurate time keeping essential for many fields of interests such as alarms,water sprinkler irrigations etc businesses.Exactly what I needed.

3. So I would need this app especially to auto synchronize because my tablet doesn't keep the time well.

4. My tablet's time still stays 35 seconds fast no matter how many times I touch synchronize.

5. Tells me my device is 35 seconds fast but I touch synchronize and it doesn't do anything.

6. Best app linked to atomic clockclock does not move, just provides the time when one touches it.

7. Useless for setting time on a watch or clock.Use it quite a lot.

8. worked well at the begining, Now it doesn't Sign in at all, I will have to uninstall it completely.Great precision.

9. Autosync every 15 min doesn't work, is not a valid option.

10. If I don't update it manually, after a month or so the difference may be of a couple of minutes, sometime even 10 or so.

11. If it was, why would I need this app?My review was removed so am reposting it.

Steps to Troubleshoot & Fix Atomic Clock Issues

1. Fix Atomic Clock Not Working/Crashes/Errors/Unresponsive & Black/White screen:


  1. Restart Atomic Clock: Restarting the app will resolve most errors.
  2. Update the Atomic Clock App. Here is how:
    1. On Android goto PlayStore » Search for "Atomic Clock" » Open Atomic Clock - US NIST Time » click "Update".
    2. On iPhone, goto AppStore » Your profile » Available Updates » Check for Atomic Clock » click "UPDATE".
  3. Clear Atomic Clock - US NIST Time app cache: Clearing cached data will force your app to retrieve the latest data directly from Atomic Clock servers.
    1. On Android, goto Settings » Apps » Select "Atomic Clock - US NIST Time" » click Storage » click "Clear Cache".
  4. Check Atomic Clock app permissions. If any of these permissions required to use your device's features are disenabled, Atomic Clock might not work.
  5. Uninstall and reinstall Atomic Clock. If nothing else has worked, completely uninstall Atomic Clock then reinstall.
  6. Restart your device. Last, restarting your device can often clear most problems causing Atomic Clock not working


2. Fix Atomic Clock Server issues & Internet Connection


  1. Check network connection: An unstable Internet will make Atomic Clock be unable to connect to it's servers. Ensure your wi-fi is working then restart app.
  2. Disable VPN: VPN can cause connection errors and lead to Atomic Clock not working. Make sure all VPNs are off
  3. Enable background data: When Background data is turned off, Atomic Clock may not be able to connect to the Internet when running in the background.

Reported Issues