CalStack

Your day by the hour, your plans two years out. Calendar, world clocks, tasks, with email context in one dashboard, with a private assistant that knows your schedule.

CalStack is a personal command center for your calendar, email, tasks, notes, contacts, and AI assistant.

Built for people who live across meetings, travel, family schedules, projects, and inboxes, CalStack brings the day into one focused view instead of scattering it across apps.

See your day, upcoming week, pinned events, meetings, reminders, and time zones in a single dashboard. Use Start Day, Check In, and Wind Down rituals to turn your calendar, email, tasks, and notes into practical daily context.

CalStack also includes an AI chatbot that can work with your local app context, including calendar events, synced notes, processed email, contacts, and saved preferences. You can connect supported AI providers or local model servers depending on your setup.

Key features: • Unified calendar dashboard • Day, week, month, quarter, year, and list calendar views • Pinned and starred calendar events • Time zone dashboard with time scrubber • AI-assisted Start Day, Check In, and Wind Down workflows • Email sync and searchable email context • Brain notes and memory layer • Contact tracking • Meeting and video link support • Local model support for privacy-focused workflows • iCloud sync for supported app data • Native iPhone, iPad, and Mac layouts

CalStack is designed to help you understand what matters today, prepare for what is coming next, and keep useful context close without turning your day into another inbox.