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
Release
Nov 20, 2017
Last Updates
Mar 28, 2025
Rating
Rated for 3+
Genre
Tools
Reviews
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."
A Google user
It's fantastic to know real accurate clock time. However, I would like to see how much time is lost per year.
James van Zyl
Was great. Now you lose half the screen to Google Ad Services after 4-7 seconds and cannot get rid of it even after 'not interested in this ad' clicks. A clock that you can view for 4 seconds. Forget it. Uninstalled.
Bernard Kasparas
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.
A Google user
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.
Bill Kinsman
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.
Malachi Travestra
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
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.
Philip Luck
Ok. Was told to never argue with a dummy. It was included. For free. Now its not. Shame. Enough said. Reply. I would have never kept the app. Reply to publisher... Yes. Ive been using the app for months with the widget. Until recently when you killed it unless I pay on top of viewing ads. Shame. made it so you have to pay to use the widget. On top of ads already in the app. Uninstalling.
A Google user
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.
Siddharth Bhattacharya
I use this app to check my own local NTP server.. You can set a custom server.. other apps you are stuck with what ever server they set it to. Would like to be able to change color of clock hands. A darn good clock buy it! I also like to use it with a big ben clock chimes! If you get server error it's you.. This Ap works flawless. I use it everyday to my own NTP server with a VPN connection And mobile data.. Works great local too. Server response problems is not the Ap's fault..
A Google user