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Simple Calendar - easy planner: what 26 low-star reviews complain about

We read 26 one-to-three-star reviews written between 2026-06-11 and 2026-09-09 and kept the ones that describe a specific unmet need. Grouped with reviews of other apps that say the same thing, they land in 4 repeated complaints. Store listing.

What reviewers complain about

• Widget won't scroll
• Unreliable reminders
• Unexpected automatic sync
• Unable to add new events
• Sync deleted all existing data
• Requires access to mobile calendar
• Random data deletion
• Poor use of screen space
• Only works as copy of default calendar
• Only shows one event

The opportunities these reviews point to

1. 0180Shared calendar app preserving free core organization features6 of 90
2. 0281Calendar app with reliable data persistence and backups2 of 70
3. 0352Locked — subscribe to read this opportunity2 of 2
4. 0442Locked — subscribe to read this opportunity1 of 2

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