AtomicClock: NTP Clock is a tools app developed by Timo Partl.
Download Statistics
AtomicClock: NTP Clock has been downloaded 600 thousand times. In the last 30 days, the app was downloaded 2.6 thousand times.
User Ratings
AtomicClock: NTP Clock is rated 4.71 out of 5 stars. The rating is based on 17 thousand ratings.
App Information
AtomicClock: NTP Clock is FREE to download. The APK download size is 4.60 MB. The latest version available is 2.1.21. The last update was on June 30, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play November 2017.
Description
Need the exact time to set a watch, set a wall clock, compare UTC, or catch a moment where seconds matter? AtomicClock shows precise reference time from NTP time servers in a clean analog and digital clock display.
Use AtomicClock as an atomic clock, NTP clock, UTC clock, reference clock, or everyday precision clock when accurate seconds are important.
Core features: • precise current time from NTP servers • local time and UTC time • analog clock and digital clock views • customizable home screen clock widget with time and date • predefined time servers and custom time server selection • 12-hour and 24-hour modes • customizable time format • multiple clock faces and clock hands • smooth fluid second hand • acoustic ticking sounds • Greenwich Time Signal • technical NTP details such as round-trip time and stratum • screen tap actions to hide info, freeze the screen, or mute ticking • picture-in-picture mode
AtomicClock is useful for manually setting watches, wall clocks, cameras, and other devices, checking exact time before an event, comparing local time with UTC, or keeping a clear seconds clock on screen while you work.
For technical users, AtomicClock can show NTP server information so you can see more than just the clock face. Accuracy depends on the selected time server, network conditions, and device behavior.
AtomicClock is free to use. Some advanced features require AtomicClock Pro, available as a one-time purchase with no subscription.
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It's a good app. I pay for a full version. I have an old school Casio watch. I like to sync my watch to the second. The display is clean and plan. You don't need an atomic watch. Quartz is very accurate as long as you synchronize it.
★★★★☆Kenagain· Oct 31, 2025
Had the free version for a long time and decided to get the paid for version. Found that the paid for one says you can change fonts and font colors, but they don't work as they should. I tried changing the color to red, and it stayed white but changed the font on the widget. If it gets sorted will give it 5 stars.
★★★★★James Sinnott· Jun 21, 2026
Great for Atomic clock geeks. Phone time is always off by a few milliseconds. This app is as close as you can get.
★★★★★S Crook· Jul 7, 2026
Have used for several years. Great for setting clocks, if you are one of those who just wants accurate time
★☆☆☆☆Lawrence Widacki· Sep 20, 2025
I uninstalled the app because of the ads now. This app used to be ad free.
★☆☆☆☆Karl Stevens· Jan 2, 2026
I was unable to use it because of the obtrusive ads. Having a popup that takes up the entire screen makes this useless.
★★☆☆☆James Brown· Jan 4, 2026
The clock gets covered by ads, so it's useless.
★★☆☆☆Andy Brownfield· Dec 28, 2025
The app is clean and works well, but the ads pop up and cover most of the clock. It's annoying to use, so I'm installing a different atomic clock app.
Google Play Rankings for AtomicClock: NTP Clock
This app is not ranked
Technologies used by AtomicClock: NTP Clock
AtomicClock: NTP Clock is requesting 13 permissions and is using 16 libraries.
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