PrecisionClock icon
PrecisionClock icon

PrecisionClock

PrecisionClock is a free, open-source, GPL-3.0 desktop time reference tool for Windows and Linux.

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Platforms

  • Windows  Windows 10 / 11 x64. No runtime dependencies.
  • Linux  Requires system GTK3. Tested on Ubuntu 22.04+, Debian 12+, Fedora 38+.
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PrecisionClock was added to AlternativeTo by Colligatio Pub on and this page was last updated .

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What is PrecisionClock?

PrecisionClock is a free, open-source, GPL-3.0 desktop time reference tool for Windows and Linux.

Normal mode offers 1-second precision, prioritizing NTP synchronization and falling back to local time after three consecutive failures. Precision mode offers 0.001-second precision, enforcing multi-source cross-validation and reporting errors immediately on failure — never falling back to local time.

No ads, no data collection, no registration, and no mandatory online validation.