Adjustable clock app for Android: sync your phone with a school bell, office time clock or any wall clock that runs fast or slow. Clock offset calibration to the second, with home screen widgets. Android 8.0+.
android kotlin open-source widget clock android-app time-clock android-widget time-sync time-offset clock-widget school-bell time-calibration adjustable-clock clock-offset offset-clock
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Updated
Oct 6, 2026 - Kotlin