Atomic clock tool

Synchronize your system time with this improved atomic clock utility.

Chronos Atomic Clock Synchronizer is a small utility that synchronizes your Windows system's internal clock with online time servers that use ultra-accurate atomic clocks. Yes, Windows already does that; Chronos adds flexibility and displays more information, such as latency and correction in fractions of a second. Best of all, you can specify a connecting interval instead of relying on Windows' unspecified "scheduled basis." By querying multiple clocks simultaneously, it returns the most accurate average of the current time.

Chronos has a small but attractively colored interface with a list of Time Servers as well as their latency and correction factor. Below the main view is the Connecting interval slider; the default position is every 5 minutes, but we could select a range from no connection at all to every three days. This tool has four buttons: Add Server, Restore Server List, Synchronize Time, and Minimize. Adding a new time server is a simple matter of clicking Add Server and typing in its address; right-clicking let us test, edit, and enable or disable the new server entry. Clicking Synchronize Time prompted Chronos to query all the servers and adjusted the system time accordingly. Some time servers showed a slow or refused connection, but we could simply delete them if we liked. Clicking Restore Server List restored the program's default list. Clicking Minimize sent the program to its system-tray icon, which let us Open or Exit Chronos or synchronize the time.

Chronos Atomic Clock Synchronizer certainly improves on the built-in Windows time synchronization feature, both in terms of flexible operation as well as overall accuracy. While many people probably don't worry much about how often Windows checks the time, those with critical timekeeping needs will appreciate the extra capabilities in Chronos. Since it's free, you have nothing to lose but time lost to inaccurate clocks.

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