ClockToolkit is a free, fast, and privacy-first collection of time
tools built for everyone — travelers, developers, students, and
everyday planners.
We believe time management tools should be accessible without
barriers: no signups, no paywalls, no data harvesting. Every tool
works in your browser, in real time.
Lunar calculations: computed algorithmically using the lunar synodic
period
World time: browser's Intl.DateTimeFormat
Frequently Asked Questions
Is ClockToolkit free? Yes — 100% free, forever.
We're ad-supported to keep the lights on.
Do I need to create an account? No. All tools
work instantly without registration.
How accurate is the clock? The clock syncs to
your device's system time. For millisecond-precision needs, check with
an NTP server.
Why is the weather not updating? Weather data
comes from Open-Meteo's free API. If the city isn't found, try a
larger nearby city or your coordinates.
Can I use this offline? Clock, stopwatch,
timers, alarm, pomodoro, date diff, Unix converter, and lunar tracker
all work offline. Weather and geocoding require internet.
Do alarms work when the tab is closed? Alarms
require the tab to remain open. We use the Web Audio API to ring — no
push notifications yet.
How is the lunar phase calculated? Using the
known New Moon epoch and the 29.53059-day synodic period to compute
current phase angle.
Where can I report a bug or suggest a feature? We'd love to hear from you — use the newsletter/contact form to
reach us.
Privacy Policy
ClockToolkit does not collect, store, or sell personal data. We do not
use cookies beyond what's needed to display ads via third-party ad
networks.
Third-party ad partners may use cookies to serve relevant ads. You can
opt out via your browser's privacy settings or relevant ad opt-out
pages (e.g., NAI, DAA).
Weather search queries are sent to the Open-Meteo API — see their
terms
for details. No queries are logged by us.
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