AtomicClock: NTP Time
Super-precise internet time from NTP servers connected to real atomic clocks
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About
Ever wanted to know exact current time to celebrate someone's birthday or New Year's Eve? Or simply to synchronize clocks? AtomicClock provides the accurate time from NTP servers which are getting the time directly from atomic clocks! • current precise time in correct time format • analog & digital clock • choose from different time servers or add own ones • customizable widget with time & date • acoustic ticking & fluid second hand • choose between different clock faces • switch between local time and UTC, 24-hour and 12-hour clock • sync your physical watches & clocks • technical info like round trip time or stratum • Greenwich Time Signal AtomicClock: The most accurate time on Android.
Info
Genre
Tools
Rating
Rated for 3+
Release
Nov 20, 2017
Last Update
Mar 28, 2025
Gallery
Contacts
Timo Partl
Hörnlesweg 8 70794 Filderstadt Germany
Reviews
Bill Kinsman
Still is a good app. Even though the pro version is affordable. I really don't need it because I have a GPS watch. I can't bad-mouth the developer for trying to make a living. The Google ads are enough to get you to stop using the free version for sure.
A Google user
a very nice app to have. I like having one accurate source for the correct time that is as handy as this one and as easy to navigate. Visually, it is very clean with many options for displaying the time both digital and analog. Another bonus is that it is very small and has never given any me any problems. Good job, developers.
Siddharth Bhattacharya
Loving the App & Premium features. Please add the option to get Time from GNSS Satellites. The feature is so interesting & very few Apps are having that. Don't change the App name.
Philip Luck
A nice app, and I'd like to buy the 'pro' version, but for two things. Firstly, it's not possible to get the app to set the correct time on the phone (although that might be an Android limitation). Secondly - and this is the game changer - the widget displays the phone time, not the ntp synchronised time. ETA: Apparently it's not possible to have a battery efficient widget that syncs with ntp time. However it is possible to set the system time programmaticaly, and disable network sync.
Pookie Johnson
I really like this clock mainly for the color options, the accuracy and the precise digit increments. One of the best overall clocks on the Play Store.
James van Zyl
It's fantastic to know real accurate clock time. However, I would like to see how much time is lost per year.
Wei Lu
Cannot calibrate system time accordingly. Thanks to your explanation now I know it's a limit of Android. I think you should make that statement apparently.
Paul Robinson-Dow
Unfortunately I can't find a sync button to link this app to my Samsung S6 Edge. ...... thank you for your reply with explanation. Still a pity there can't be a little widget with the time so I can see it every time I look at the phone instead of the Samsung time. Otherwise I do like the clock. I will update the stars and consider upgrading my phone which I've put off for too long now. Then hopefully I'll have the sync and a widget with the time? :)
A Google user
Excellent NTP app, quite customizable, easy to read while I set my clocks, Retrieve Time option nice, great privacy policy and inexpensive for ad-free. Thanks!
A Google user
I don't have an easy access to a sync'ed atomic clock or a good WWV receiver anymore, so I cannot independently validate the accuracy of your clock. I am sure it is more accurate than anything else I do have access to. The first 9 years of my career were in USAF PMEL (Metrology) labs. Having an atomic clock at my fingertips again is a reassuring comfort. Thanks.
A Google user
DACri here: I love the colors to choose from and I wish it had a display widget for my home screen where the clock face can be seen on screen without me having to open the app. Not really sure why I actually need this, as my phone is automatically updated with current time and date even when I cross time zones. Anyway, I like the app. I guess, because it says ATOMIC! I would like the app much better if you had artworks similar to Salvador Dali' painting "Persistence of Time."