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Checker Plus for Google Calendar™: what 18 low-star reviews complain about

We read 18 one-to-three-star reviews written between 2017-08-10 and 2025-12-23 and kept the ones that describe a specific unmet need. Grouped with reviews of other apps that say the same thing, they land in 3 repeated complaints. Store listing.

What reviewers complain about

• Ugly default styling
• Time to next event doesn't update
• Slows down browser startup
• Slow half-second load times popup closes when mouse moves to click events bloated instead of simple cant click events to edit performance issues and bugs
• Reinstall doesn't fix broken state
• Previously free feature now requires donation
• Popup notifications don't trigger
• Persistent undismissable notifications from past events
• Paywall to change style
• Pay-to-create-events defeats extension purpose

The opportunities these reviews point to

1. 0180Shared calendar app preserving free core organization features1 of 90
2. 0249Locked — subscribe to read this opportunity1 of 2
3. 0348Locked — subscribe to read this opportunity1 of 4

Score out of 100, then how many of the cluster's reviews are about this app out of its total. Category: Productivity.