Cool Clock
An extension fully loaded with tons of useful time-related features... But the best part is, it is totally COOL.
Cool Clock - Multifunctional Time-Related Chrome Extension
'Cool Clock' is a comprehensive Chrome extension offering multiple time-related features. It includes a customizable clock located in the toolbar, along with an hourly notification feature which can even announce the time via TTS. Useful tools like a stopwatch, alarm and countdown timer are integrated, along with a simple calendar. You can also quick search your alarms and to-dos by typing 'clock' in the Omnibox. The appearance and timezone settings can be easily adjusted. Despite no longer being in active development, it thrives as an open-source project with the source available on GitHub for contributions.
Extension stats
Manifest V2
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
Ranking
Other platforms
Not available on Android
Not available on Firefox
Not available on Edge
User reviews
These summaries are automatically generated weekly using AI based on recent user reviews.
Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate,
spammy, or outdated. Pros
- Simple and needed functionality
- Combination of alarms, calendar, and clock in one extension
- Works well once reinstalled and settings adjusted
Cons
- Frequently stops working or shows a blank screen
- Settings often reset, making it unusable
- Issues with compatibility on various operating systems and browsers
Most mentioned
- Not working or displaying properly
- Settings not being retained
- Blue background with unclickable text showing features only
User reviews
BEST but doesn't work now. Hope update.
:(
by 
YiLing Chen, 2025-03-06
YiLing Chen, 2025-03-06최고최고 간단하지만 꼭 필요한 기능 감사합니다.
by 
Cloud Ku, 2025-02-18
Cloud Ku, 2025-02-18Best 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.
by 
Josue Fuentes, 2024-11-20
Josue Fuentes, 2024-11-20Extension 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
We don't have sufficient data to confidently determine the risk likelihood of Cool Clock. Use it at your own risk.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
Upgrade to see full risk analysis details
Promo images
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