Google Calendar Event Checker

How to install Open in Chrome Web Store

CRX ID

ignkdmgghpdgdlnljcmimlabaiekglhg

Status

Extension status: Featured
Extension status: In-App Purchases

Description from extension meta

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

Image from store

Description from store

Mark Google Calendar events as completed with checkmarks, emojis, or strikethrough and turn your calendar into a task tracker.

It’s the perfect tool for professionals, students, and anyone who wants to mark events as done or canceled and boost productivity.

🆓 Free Version Features 🆓
Available immediately after installation - no sign-in or subscription required:
▸ Customizable completion marks: choose between emojis (✅ or ❌), unicode checkmark (✓), or strikethrough effect (title crossed off).
▸ Automatic timestamps: save completion date/time in event description for easy reference.
▸ Edit-page marking: mark events as done from the calendar event edit page.
▸ Minimal and Privacy-Oriented: the extension is designed to be minimalistic and don’t track any user data.

⭐ Premium Version Features ⭐
Unlock advanced productivity and simplicity features:
▸ Quick-mark from event dialog: complete events with one click from the event popup.
▸ Daily events dashboard: view all today's events in the extension popup with completion status.
▸ Mark from any tab: complete calendar events without opening Google Calendar.
▸ Custom checkmark slots: add up to 5 emojis or unicode symbols as completion markers.
▸ Still Minimal and Privacy-Oriented: we don't see or store any of your events and never share your data.

💡How to Use 💡
All demo videos available in ➡️ https://calcheckr.com ⬅️

How to use free version:
▸ Install the extension, no sign in needed
▸ Open any Google Calendar event for editing
▸ Click the completion mark button (✅)
▸ Save the event
▸ Go to the extension's options to configure the completion marks and a strike-through effect.

How to use premium version:
▸ Pin extension and sign in with your Google account
▸ Start free trial (no credit card needed)
▸ Mark events as completed from an event dialog
▸ Mark events as completed from "Today events" view
▸ Configure custom checkmarks and a strike-through effect in ⚙️ User Settings page (available after sign in).

All demo videos available in ➡️ https://calcheckr.com ⬅️

🚀 Supported browsers 🚀
▸ Google Chrome
▸ Microsoft Edge
▸ Any other chromium-based browsers: Brave, Opera, Yandex

⚠️ Troubleshooting ⚠️
If something isn't working properly, here's what you can try:
▸ Make sure you can edit event title from an event edit page - some events are not editable at all - for example: working locations, contacts’ birthdays calendar, shared calendars if you don’t have proper permissions.
▸ Sign out and sign back to the extension (for premium users).
▸ Reinstall the extension.
▸ Report an issue to [email protected], include screenshots if possible as it might help to resolve your case more quickly, make sure to mention what browser you’re using.

❓Frequently Asked Questions❓
Q: How do I mark Google Calendar events as completed?
A: Install the extension, open any event, and use the completion button or choose your preferred visual mark (checkmark, emoji, or strikethrough).

Q: Will other people see my completion marks?
A: Yes! Since changes save directly to Google Calendar, anyone with calendar access sees the completion marks. Great for team collaboration.

Q: Does this work with Google Workspace?
A: Absolutely! Works with personal Google accounts and Google Workspace (formerly G Suite) accounts.

Q: Does it work with recurring events?
A: Yes! Mark individual instances or the entire series.

Q: Can I use the free version forever?
A: Yes! The free plan includes core features. Upgrade to Premium only if you want one-click marking, daily views, and custom checkmarks.

Q: Is my calendar data secure?
A: Absolutely! We use only Google infrastructure. Authentication tokens are encrypted, and we never see, store, or share your calendar events data.

Q: How do I cancel Premium?
A: Cancel anytime from the Stripe customer portal. Premium features remain active until your billing period ends, then you automatically return to the free plan.

📧 Contacts 📧
For any questions, comments and ideas please reach out to [email protected]

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Changelog
2.3.1 - 01/04/2026:
- internal fixes

2.3.0 - 12/24/2025:
- workspaces support

2.2.1 - 12/18/2025:
- internal fixes

2.2.0 - 12/10/2025:
- premium: strikethrough effect in popup view
- premium: date picker for quick navigation

2.1.2 - 12/06/2025:
- internal fixes: make completion detection to be based on the default + custom checkmarks only

2.1.1 - 12/03/2025:
- internal fixes
- options page UI refactoring

2.1.0 - 12/01/2025:
- internal fixes
- add unicode symbol (✓) in free version
- custom checkmarks in premium version

2.0.2 - 11/24/2025:
- internal fixes
- add support id in extension options

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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