Google Calendar Event Checker

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 support@calcheckr.com, 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 support@calcheckr.com ================================================ Changelog 2.4.0 - 02/04/2026: - internal fixes, feedback tab, trial clarifications 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