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What's New
• 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
About this app
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.
How to Download AtomicClock: NTP Clock APK
- Enter the package name
partl.atomicclockon the APK Downloader homepage. - Select your device architecture (ARM64 recommended for modern devices).
- Click Download to get the merged APK file.
- Transfer and install the APK on your Android device.
- Keep Updated: Visit APK Downloader regularly to search for and download the latest secure versions of your favorite apps.
Security & Signature Verification
This APK download is 100% safe. We verify that the cryptographic signature of the file matches the official developer credentials. No modifications or adware are injected.