AtomicClock

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.