Chores & Co
5.5#37 in family calendar appsFree planFree planWeb
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You want what its maker publishes above — check its page for the details.
Cozi suits families who want to coordinate events, grocery shopping, tasks, and weekly meals in one shared account. It is also a fit for households that want shared access across web, iOS, and Android, with paid tiers adding event reminders or AI meal-planning tools.