AtomicClock

Exact atomic clock time from NTP servers — UTC clock and clock widget

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 atomic clock app, NTP clock, UTC clock, precision clock, or reference clock for Android. 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 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

• Android tap actions to hide info/menu, freeze the screen, or mute ticking

Android 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, Android widgets use 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 advanced options such as preferred clock face, clock hand, clock font, ad removal, and upcoming Pro features.

If you need precise time, atomic time, an NTP clock, a UTC clock, a GMT clock, or a simple reference clock for setting devices manually, AtomicClock keeps it clear and focused on Android.