AtomicClock: NTP Time
Super-precise internet time from NTP servers connected to real atomic clocks
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App Info
Rating
Rated for 3+
Release
Nov 20, 2017
Last Update
Mar 28, 2025
Genre
Tools
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.
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Contacts
Hörnlesweg 8 70794 Filderstadt Germany
Reviews
Mantas
Digital clock position is not stable. It flickers. No option to do time re-synchronization. Poor and not accurate display of system and atomic time differences. Edit: I want that display of time diference between system and atomic clock would be more prominent and have more accurate number. Also I want that the app would let me do manual update for atomic time from NTP server. That is what I meant by time re-synchronization. That is my fault that I haven't wrote it with more specificity.
Malachi Travestra
This has been my favorite "go to" Atomic Clopck for years and I'm finally having a rare bit of time to write a review. i've never had a problem with this app. It runs smooth as silk, and it functions smooth as silk. What else can I say? I love this app.
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.
Ron D
This is the coolest clock ever! It has a very precise layout, so I can keep my antiqe cloka set as close to the most accurate time possible. I wish it had a widget that was like the default clock. But that is not a deal breaker, sbecause the digital clock is very nice, and I can?always open the default clock when I am setting my clocks. I don't purchase msny apps, but as soon as I give it a few says to make sure it stays running properly, I plan to buy tbe pro version.
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
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.
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? :)
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.
Diane Esbeck- Nichols
I opened the screen on my app and found it running quickly, date, hour minute and second just doing its job. I love the dark back drop for easy reading, especially when I have just woke up and also because my photophobia can be upset by a too- bright screen. (That's a thoughtfulness other apps could learn from you.). I would like to add that while some folks can only read digital time, you offer a face clock as well. If you offered a calendar/alarm clock I could get rid of 2 other apps.
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.
Crownlodge Limited
A really useful 'app' that I have been using on both mobile phones and PCs for years. Unfortunately, it is no longer available to download from Microsoft Store for Windows 8.1 Mobile or Windows 10 Mobile but, if it is already installed, it will still function correctly - so, if possible do not reset your phone or inadvertently uninstall the app because it will be lost permanently. It is still available on Windows 10 for PCs but Windows 11 will be coming 'on stream' soon, so be prepared!!