Google Calendar Event Checker

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

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 ❌), unicode checkmark (✓) 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 - Customize checkmarks: add up to 5 slots of any emoji or many unicode symbols as a completion checkmark 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 (no credit card) 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 2.1.0 - 01/12/2025: - 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