Undo Calendar changes, test safely with snapshots, and build event bundles directly inside Google Calendar™.
Listing updated:June 11, 2026
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Overview
LayerLogic adds powerful, practical tools to Google Calendar™ to help you make changes safely, recover quickly, and build structured schedules with confidence.

- Undo and Redo Calendar Changes - 
Quickly reverse changes made to Google Calendar™ events.
Undo edits to event titles, times, descriptions, and more
Redo actions when needed
Track recent changes directly within the sidebar
LayerLogic helps prevent small mistakes from turning into time-consuming fixes.

- Snapshots for Safe Experimentation - 
Capture a snapshot of your calendar, explore changes, and return to your original state if needed.
Take a snapshot before making updates
Test alternative schedules or edits freely
Restore your original calendar state with a single action
Snapshots are designed for safe, temporary experimentation — not permanent backups.

- Logic Bundles for Structured Scheduling -
Create and apply templates of all-day events to build consistent, repeatable schedules.
Build event bundles with predefined offsets
Automatically space events across days
Apply weekend-aware scheduling rules
Customize titles and descriptions before applying
Logic Bundles make it easy to plan projects, timelines, and workflows directly in your calendar.

- Built for Real Calendar Workflows -
LayerLogic is designed to work directly within Google Calendar™:
No separate app or dashboard required
All actions are performed inside the calendar sidebar
Changes are only made when initiated by the user

- Free and Pro Features -
LayerLogic includes a free tier with core functionality and a Pro tier with expanded capabilities.
Upgrade to Pro for:
Multi-calendar support for all tools
Extended undo history
Expanded Logic Bundle usage

- Notes -
Undo and Snapshots apply to standalone events
Recurring events are not modified in this version
All actions are user-initiated

Support
Support is available directly within the add-on.
If you have questions or run into issues, you can contact us from the sidebar.

Google™ and Google Calendar™ are trademarks of Google LLC.
Additional information
PricingFree of charge with paid features
Privacy policy
Terms of service
LayerLogic will ask for the permissions shown below. Learn more
LayerLogic will need access to your Google account
This will allow LayerLogic to :
Run as a Calendar add-on
See, edit, share, and permanently delete all the calendars you can access using Google Calendar
Display and run third-party web content in prompts and sidebars inside Google applications
Allow this application to run when you are not present
Send email as you
Connect to an external service
View your country, language, and timezone
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
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