AtomicClock vs Exact Seconds

Check precise NTP reference time at a glance. AtomicClock helps you set watches, wall clocks, cameras, and other devices, compare local time with UTC, and follow moments when every second matters. Clear analog and digital time AtomicClock displays current time from NTP servers that reference atomic clocks. Choose a predefined server or add your own, then view local or UTC time in a clean analog or digital clock. Customize your reference clock • Switch between 12-hour and 24-hour time • Customize the time format • Choose from multiple clock faces and hands • Use a smooth, fluid second hand • Add acoustic ticking or the Greenwich Time Signal • Tap the screen to hide information and controls, freeze the display, or mute ticking Details for precise time checks View technical NTP information, including round-trip time and server stratum. Whether you are checking a timestamp, preparing a camera, aligning a wall clock, or setting a watch by hand, the seconds remain clear and easy to follow. AtomicClock is free to use. AtomicClock Pro is available as a one-time purchase with no subscription. It unlocks your preferred clock face, hands, and font, removes ads, and includes upcoming Pro features. AtomicClock displays NTP reference time for comparison and does not change your device’s system time. Results can vary with the selected server, network conditions, and device behavior.

Exact Seconds is a clean, focused clock that shows the current time down to the second. Use it when timing matters — coordinating a precise moment, checking the current second at a glance, or keeping an easy-to-read seconds clock on your iPhone. Features: • Large in-app clock with live seconds • Home Screen widgets with live seconds • Lock Screen widget with live seconds • CarPlay widget support • Multiple widget sizes • Widget appearance themes and color options • Stable HH:mm:ss time format • 12-hour, 24-hour, or system time format in the app • Multiple in-app clock colors • Black or white in-app background • Optional in-app date display • No account required • No ads • No advertising or cross-app tracking The main app gives you a customizable full-screen seconds clock. Widgets provide quick access to exact time on the Home Screen, Lock Screen, and supported CarPlay displays. Exact Seconds uses your iPhone system time. For best accuracy, keep Set Automatically enabled in iOS Date & Time settings. Seconds uses limited anonymous product analytics to understand whether widgets remain active over time. This analytics does not use IDFA and is not used for advertising or cross-app tracking.