Cool Clock

An extension fully loaded with tons of useful time-related features... But the best part is, it is totally COOL.

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Cool Clock is a powerful Chrome extension loaded with versatile time-related functionalities. Unlike ordinary toolbar clocks, it allows you to personalize multiple clock appearances and supports various time display methods tailored to your preferences.

Beyond simple time-telling, Cool Clock features configurable hourly notifications with text-to-speech announcements, a stopwatch, alarm, countdown timer, and a handy calendar. Quickly access your alarms and to-dos by typing "clock" in the Omnibox. It's also an open-source project welcoming community contributions on GitHub. Whether you want to keep track discreetly or stay informed on the hour, Cool Clock puts comprehensive time management right in your browser.

By:: Derek L.
Users:: 80,000+
Rating:: 4.20
(1,731)
Version:: 3.3.2 (Last updated: 2018-03-04)
Creation date:: 2018-03-03
Risk:: Moderate risk impact Low risk likelihood
Permissions:: notifications
contextMenus
tts
*://calendar.google.com/*
*://www.google.com/calendar/feeds/*
clipboardWrite
activeTab
alarms
power
idle
Size:: 2.00M
Email:: co*****@derek-leung.com
Full description:: See detailed description
Source:: Chrome Web Store
Updated:: a day ago

Ranking

# 2,668 ▼ 44

Other rankings

#9839 in Workflow & Planning ▲ 9

#1 in clock keyword 34

#1 in cool keyword 19

#47 in trademark keyword 14 ▼ 4

#50 in alarm keyword 22

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User reviews

Users appreciate Cool Clock for combining multiple time-related tools like alarms, calendar, stopwatch, and countdown timers in a simple interface. However, many report that the extension is currently broken, showing only a blue screen with text and no working features. Issues include persistent bugs, loss of settings, and compatibility problems with certain devices and browsers. Some users find reinstalling and disabling the new popup design temporarily restores function. Overall, the extension was well regarded before recent functionality loss and needs updating to fix these problems.

Pros

Includes multiple useful features such as alarm, calendar, countdown timer and stopwatch all in one extension.
Simple and easy to use with necessary functionalities appreciated by users.
Allows customization options like turning off the new popup design to restore old interface.
Some users confirmed it works fine after reinstalling or on certain devices.
Overall positive reputation before recent issues.

Cons

The extension currently does not work properly; clicking on it shows only a blue box with feature names and no functionality.
Users report persistent bugs and crashes causing loss of saved settings, making it unusable.
Compatibility issues exist with certain devices and browsers such as Chromebooks, Mac OS, and Brave browser.
Newest version or popup design seems broken, requiring users to disable new popup design to regain some functionality.
The extension lacks updates and maintenance, leading to functional degradation over time.

Recent reviews

BEST but doesn't work now. Hope update. :(

YiLing Chen, 2025-03-06

최고최고 간단하지만 꼭 필요한 기능 감사합니다.

Cloud Ku, 2025-02-18

Best extention ever, it has alarms, calendar and clock all in one, just go to the settings and turn off the new pop-up design, there you go.

Josue Fuentes, 2024-11-20

View all user reviews

Extension safety

Risk impact

Cool Clock requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: google.com
High ****** ******* *** ********* ********* ******** ***** *** ** ********** ****** * ******** ******* *****
Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
Low ****** ***** ** ******* ****** ********** **** ** ** ******** ******* ** **** ***** *************

Risk likelihood

Cool Clock has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******

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