Free core app with optional one-time Pro upgrade for extra customization and ad removal
Lacks built-in weather or world clock features that some competitors offer
Widget accuracy relies on Android system time; to view NTP reference time, open the app
About AtomicClock: NTP Clock
AtomicClock: NTP Clock is a tools app developed by Timo Partl.
How many times has AtomicClock: NTP Clock been downloaded?
AtomicClock: NTP Clock has been downloaded 600 thousand times. In the last 30 days, the app was downloaded 4.2 thousand times.
What is the rating of AtomicClock: NTP Clock?
AtomicClock: NTP Clock is rated 4.70 out of 5 stars, based on 17 thousand ratings.
Is AtomicClock: NTP Clock free?
AtomicClock: NTP Clock is free to download. The APK download size is 4.65 MB. The latest version available is 2.1.20. The last update was on June 15, 2026.
What are the requirements for AtomicClock: NTP Clock?
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 displays precise NTP time from internet time servers that reference atomic clocks.
Use AtomicClock as a clean NTP clock, atomic clock app, UTC clock, precision clock, or reference clock. It combines a readable analog clock and digital clock with technical network time details when you need them.
Why people use AtomicClock • Check exact current time from selectable NTP time servers • Manually set watches, wall clocks, cameras, radios, and other devices • Compare local time with UTC, GMT, and Greenwich Time Signal • Keep a seconds clock open for New Year's Eve, birthdays, photography, astronomy, radio, IT, engineering, and hobbies • Use a clear clock display on your phone or tablet
NTP time and server control • Choose from predefined time servers or add a custom NTP time server • View technical NTP information such as round-trip time and stratum • Switch between local time and UTC • Use 12-hour or 24-hour time and customize the time format • Check network time without changing your Android system clock
Clock display and sounds • Analog clock and digital clock views • Multiple clock faces and clock hands • Smooth second hand for an easy-to-read seconds display • Optional acoustic ticking sounds • Greenwich Time Signal for classic reference timing • Tap actions to hide info/menu, freeze the screen, or mute ticking
Clock widget • Add a customizable home screen clock widget with time and date • AtomicClock Pro includes many widget customization options • For technical and battery reasons, the clock widget uses Android system time; open the app for NTP reference time from selected servers
Free and Pro AtomicClock is free to use. AtomicClock Pro is a one-time purchase with no subscription and unlocks preferred clock face, clock hand, clock font, ad removal, all tap actions, picture-in-picture mode, and upcoming Pro features.
If you need precise time, atomic time, an NTP clock, a UTC clock, a GMT clock, an analog clock, or a simple reference clock for setting devices manually, AtomicClock keeps it clear and focused.
Recent changes: • Redesigned the color picker for app and widget colors, with presets, a color wheel, and brightness control
• Pro: widget backgrounds can now be customized with color and opacity, and default widget colors follow your Android theme better
• Settings now use clearer icons to make customization options easier to scan
• Custom NTP servers now support host:port entries and better validation before saving
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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.
★★★★★A Google user· Mar 30, 2025
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!
★★★★★Daniel Gaines· Apr 8, 2026
So far so good. I use a wristwatch that receives the Atomic Clock Radio Signal broadcasted Nationally. It's spot on. Thx for the detailed customization.
★★☆☆☆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.
★☆☆☆☆Bernard Kasparas· Apr 27, 2025
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.
★★☆☆☆James Brown· Jan 4, 2026
The clock gets covered by ads, so it's useless.
Google Play Rankings for AtomicClock: NTP Clock
This app is not ranked
Technologies used by AtomicClock: NTP Clock
13 permissions·16 libraries
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