Atomic Clock vs Exact Seconds

Always know the exact time with Atomic Clock – Precise Time. Our app synchronizes with official atomic time servers to deliver ultra-accurate time down to the millisecond. Whether you’re coordinating across time zones, managing scientific experiments, or simply want the most reliable clock, this app provides unmatched precision. Features: - Real-time synchronization with global atomic clock servers - 24-hour and 12-hour display options - Beautiful, minimal clock face with dark mode - Works online and offline with last known atomic time - Perfect for professionals, travelers, pilots, scientists, and anyone who values absolute accuracy. An atomic clock is a timekeeping device that measures time based on the vibrations or transitions of atoms—usually cesium or rubidium. Unlike mechanical or quartz clocks, which rely on moving parts or crystals, atomic clocks use the natural oscillations of atoms as their frequency standard. This makes them the most accurate clocks ever developed, capable of maintaining time to within a few billionths of a second per day. Atomic clocks are essential for applications where extreme precision is required, such as GPS navigation, telecommunications, space exploration, scientific experiments, and synchronizing global networks.

Exact Seconds is a clean, focused clock that shows the current time down to the second. Use it whenever precise timing matters: coordinate an exact moment, check the current second at a glance, or keep a large, easy-to-read clock open on your iPhone. CUSTOMIZABLE LIVE CLOCK Choose the appearance that works best for you. Set the time format, clock color, background, and optional date display directly in the app. LIVE SECONDS WIDGETS Keep the exact time visible without opening the app. Exact Seconds supports Home Screen widgets, a Lock Screen widget, and supported CarPlay displays. Choose from multiple widget sizes and customize their appearance with built-in themes or independent background, time, and date colors. Appearance changes apply to existing widgets without requiring you to remove and add them again. 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 • 12 built-in widget themes • Independent background, time, and date colors • System, 12-hour, and 24-hour time formats • Live seconds preserved in every time format • 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 Exact Seconds uses your iPhone system time. For the best accuracy, keep Set Automatically enabled in iOS Date & Time settings. Exact Seconds uses limited anonymous analytics to understand whether widgets remain active over time and to improve widget reliability. This analytics does not use IDFA and is not used for advertising or cross-app tracking.