Google Calendar Event Checker

How to install Open in Chrome Web Store

CRX ID

ignkdmgghpdgdlnljcmimlabaiekglhg

Status

Extension status: Featured
Live on Store

Description from extension meta

Mark events as completed or cancelled in Google Calendar with emojis or strikethroughs.

Image from store

Description from store

It's perfect tool for those who regularly use Google Calendar in their browser and want to boost productivity, especially in learning how to mark events as done or canceled.

Free version
Available to use right after installation, no sign-in or subscription required. Features:
- Customizable visual cue: choose between emojis (✅ or ❌) or a strikethrough effect (title crossed off).
- Timestamps for Easy Reference: automatically saves the timestamp of completion or cancellation in the event's description, helping you keep track of your progress.
- Minimal and Privacy-Oriented: We respect your privacy. This extension is designed to be minimalistic, does not track any user data, and only requires access to Google Calendar pages.

How to Use:
1. Open an event in Google Calendar for editing.
2. Click the completion marks button (✅) and save event.
3. Witness the completion mark in action across all views.

To customize visual cues and adjust other settings, visit the extension options page.

Premium version
Simplify marking of events as completed with next features:
- Add checkmarks directly from event dialog
- See your daily events in a popup view
- Mark events on any tab: no need to open Google Calendar page

How to Use:
1. Pin extension and open extension popup view
2. Sign in with Google and go back to extension popup view
3. Start free trial
4. Mark any event as completed from "Today events" view
5. Or mark events as completed from an event dialog
Demo videos are available here: https://calcheckr.com

Changelog

2.0.1 - 11/18/2025:
- internal fixes
- show onboarding page once
- start introducing premium version

2.0.0 - 11/12/2025:
- strikethrough effect fixes
- performance improvements (button should appear faster)
- preview of premium version

1.6.5 - 02/09/2024:
- Internal improvements in error reporting

1.6.4 - 05/26/2023:
- fix button size

1.6.3 - 01/06/2023:
- Internal improvements in error reporting

1.6.2 - 12/13/2022:
- Fix issue with not showing button (input selector got updated)

1.6.1 - 10/09/2022:
- Minor internal fixes

1.6.0 - 10/09/2022:
- Add error and usage reporting option

1.5.0 - 09/16/2022:
- Internal improvements in rendering button

1.4.0 - 02/26/2022:
- add crossed mark button ❌ (as a visual cue of canceled event)

1.3.1 - 01/02/2022:
- removed redundant permission 'activeTab'

1.3.0 - 10/07/2021:
- the strikethrough effect is now configurable in options

1.2.0 - 10/05/2021:
- issue with search was fixed by saving origin event's title in the description area (configurable in options)
- add date and time label when it was completed to the description textarea (configurable in options)

1.1.0 - 10/04/2020:
- add check emoji in the beginning (configurable in options)
- fix issue for event titles with emojis

Latest reviews

Adam N-A 2025-12-02: I have used this for a while and enjoyed it, but it unfortunately no longer works
Jamie Schweitzer 2025-11-18: The checkmark button is gone?? I went through and approved all the requirements and logged back in and the checkmark button still won't appear.
Aleksandra Ballesteros 2025-11-17: I've been a MAJOR fan of this extension until I looked today at my calendar, and noticed that it requires a membership to use it. Very disappointing to see.
jin chul park 2025-11-05: That is truly excellent. I'm almost disappointed I'm only finding out about this extension now. I am using Korean. Strikethrough is applied to English text, but it doesn't work for Korean characters. Could you possibly fix this so it can be applied to Korean as well? Even if you can't, thank you for making such a great app.
Domingo Vazquez 2025-09-16: Works pretty well, but I’d love to use the feature without opening the event or with a shortcut to mark it complete. It also doesn’t work with Google Calendar’s "Focus Time", which would be really useful. Hope the team comes up with some upgrades. Blessings!
Jordan Goldstein 2025-07-16: Not seeing check mark option in the quick access change settings Not seeing check mark option in the quick access change settings only when i open the event fully
Debbie Kramer 2024-07-15: This is AWESOME, but is there a way to do it from the APP on the phone?
Gevorg Kevin Grigoryan 2024-06-25: Awesome. Feature request: wish we can check off complete right from the preview screen; when you click on the event once, a small white box comes up with preview and it has pencil, trash can, etc icons. It would be awesome to have the button right there to check off as complete, as opposed to going inside the event and checking off there.
Kavindu Gayashan 2024-06-20: love it.
Danh Nguyen 2024-05-08: OMG, I love it, really love it!!!
Jamie Tomkins 2024-04-25: Works great for what we need, but I wish there was a way to add another icon for when we need that, instead of a check or x.
Elvia Garza 2024-04-04: Love it, but it needs more options for the checkmark
Nic Thompson 2023-04-28: Didn't work for me. Only showed up about 30% of the time.
Nic Thompson 2023-04-28: Didn't work for me. Only showed up about 30% of the time.
Steve Magruder 2023-01-30: Works exactly as expected. Thank you for this extension! What would make this A+ perfect for me is if this also contained a setting to change the color coding of the event. E.g., I like to change my completed events/tasks to gray.
Steve Magruder 2023-01-30: Works exactly as expected. Thank you for this extension! What would make this A+ perfect for me is if this also contained a setting to change the color coding of the event. E.g., I like to change my completed events/tasks to gray.
Steve Johns 2022-12-16: It was working fine for the past two weeks. Today suddenly the check mark has disappeared. :( (Update: It's fixed now!)
Steve Johns 2022-12-16: It was working fine for the past two weeks. Today suddenly the check mark has disappeared. :( (Update: It's fixed now!)
Molly Hutt 2022-10-28: This is a great idea, but I wish there were more aesthetic options, like a checkmark emoji without the bright green box. The box can be confusing or distracting if you already use emojis on your calendar, e.g., to indicate different types of events so you can tell them apart quickly. It's also not ideal if you're aiming to keep your calendar's color scheme subtle and calm. I may use it in the future, but it's not quite what I need right now.
Molly Hutt 2022-10-28: This is a great idea, but I wish there were more aesthetic options, like a checkmark emoji without the bright green box. The box can be confusing or distracting if you already use emojis on your calendar, e.g., to indicate different types of events so you can tell them apart quickly. It's also not ideal if you're aiming to keep your calendar's color scheme subtle and calm. I may use it in the future, but it's not quite what I need right now.
Richard Kelley 2022-09-29: This extension worked great for about a week. Now it no longer allows strikesthrough completed or cancelled events. The check mark and "x" shows up but is non-functional. Please fix !
Richard Kelley 2022-09-29: This extension worked great for about a week. Now it no longer allows strikesthrough completed or cancelled events. The check mark and "x" shows up but is non-functional. Please fix !
Brooklyn Brackett 2022-09-07: This extension had exactly the functionality I needed but unfortunately it only worked half the time. I open an event and there is no green check option for me to strikethrough the text. Please fix! This would be so helpful if it worked!
Brooklyn Brackett 2022-09-07: This extension had exactly the functionality I needed but unfortunately it only worked half the time. I open an event and there is no green check option for me to strikethrough the text. Please fix! This would be so helpful if it worked!
Oscar Viklund (Ollie) 2022-08-20: I really like the strikethrough effect however it would be great if you could choose which emoji you wanted instead of the kinda ugly green one. But it works really well so I'm not complaining.
Oscar Viklund (Ollie) 2022-08-20: I really like the strikethrough effect however it would be great if you could choose which emoji you wanted instead of the kinda ugly green one. But it works really well so I'm not complaining.
Intan 2022-07-30: Exactly what is needed! Simple but functional! Thanks, dev!
Intan 2022-07-30: Exactly what is needed! Simple but functional! Thanks, dev!
Dan Fletcher 2022-05-10: It really is absolutely fantastic & now is an essential feature on my calendar. If it was possible to check off events from Android as well it would be even better!! Many thanks to the developers.
Dan Fletcher 2022-05-10: It really is absolutely fantastic & now is an essential feature on my calendar. If it was possible to check off events from Android as well it would be even better!! Many thanks to the developers.
Roddi Veet 2022-02-25: Hi, is there an option to add more than one box, so it can look like the event was made or not like red and green color?
Roddi Veet 2022-02-25: Hi, is there an option to add more than one box, so it can look like the event was made or not like red and green color?
Luke Eros 2022-02-08: Perfect.. Just what I needed
Luke Eros 2022-02-08: Perfect.. Just what I needed
Forrest Elliott 2022-01-21: Exactly what I was looking for! Now I can use google calendar to manage due dates without having to use tasks, which doesn't allow bulk csv import.
Forrest Elliott 2022-01-21: Exactly what I was looking for! Now I can use google calendar to manage due dates without having to use tasks, which doesn't allow bulk csv import.
Anonymous 2022-01-17: Very very cool. Exactly what I was looking for, For those of us using Brave, make sure Brave Shields is down for google calendar.
Mike D 2021-12-01: Helpful! I don't understand why this isn't already a built-in feature from Google. I wish I could do this on Android App or by right clicking on the event.
Mike D 2021-12-01: Helpful! I don't understand why this isn't already a built-in feature from Google. I wish I could do this on Android App or by right clicking on the event.
David Haddad 2021-06-29: AWESOME extension, I manage tasks and time in Google Calendar and this allows you to cross them out AND (optionally) add a check mark in front of the calendar item. Simple and perfect.
David Haddad 2021-06-29: AWESOME extension, I manage tasks and time in Google Calendar and this allows you to cross them out AND (optionally) add a check mark in front of the calendar item. Simple and perfect.
跑跑 2021-06-03: Nice!
跑跑 2021-06-03: Nice!
Priyanka Upadhyay 2021-02-12: Exactly what I was looking for. Made me ditch a to-do list app completely and now I use Google Calendar as the major to-do app. Thank you so much!
Priyanka Upadhyay 2021-02-12: Exactly what I was looking for. Made me ditch a to-do list app completely and now I use Google Calendar as the major to-do app. Thank you so much!
Molly Scott 2021-02-10: Oh this is exactly what I was looking for! Thank you! So easy to setup and use. I am using it for a "School" calendar for my boys (homeschool) so they can mark the task as completed when they finish it.
Molly Scott 2021-02-10: Oh this is exactly what I was looking for! Thank you! So easy to setup and use. I am using it for a "School" calendar for my boys (homeschool) so they can mark the task as completed when they finish it.
Allie Pigg 2020-09-22: Love this extension, but it randomly stopped working for me. The little green check mark box disappeared Google Calendar. 5 stars if you can get it fixed!
Allie Pigg 2020-09-22: Love this extension, but it randomly stopped working for me. The little green check mark box disappeared Google Calendar. 5 stars if you can get it fixed!
Carlos Armenteros M. 2020-09-18: super

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