Calendar0 shows Google, Outlook and iCloud calendars in one menu bar view with AI quick add and call notes. Free plan; Pro from $8/month.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Calendar0 is an independent AI calendar app for the web, macOS, Windows and Linux. On the desktop it sits in the menu bar or system tray, so one click next to the clock shows every calendar you have in a single week view.
It supports Google Calendar and Google Workspace, Microsoft 365 and Outlook, and Apple iCloud. The stated goal is to give people who live in meetings back the time they lose to calendar admin, such as checking several calendars, trading emails to find a slot, and trying to remember what was agreed on a call.
You connect Google, Outlook or iCloud, and the site says your week is ready in about two minutes. Google and Microsoft sign in with OAuth, so Calendar0 never sees those passwords, while Apple connects over CalDAV with an app-specific password. Calendar events are read from the provider when needed rather than stored in bulk.
From there you can type a line like "lunch with Sarah tomorrow" and the contact is resolved and the invite goes out from your own calendar. You can also ask the assistant to find a time. It tells you what it did, and bulk changes can be previewed first as a dry run.
The core is the combined week view across providers, with drag-and-drop editing, RSVP, event notifications and desktop reminders that let you join a video call in one click. Quick add and booking links handle the two most common scheduling chores: creating events and letting other people choose a time.
Call recording lives in the desktop app on Mac and Windows. It produces transcripts and AI notes, and you can search the notes of recorded calls. An MCP connector also makes your calendars available in Claude, ChatGPT, Claude Code and Cursor, where those apps can read events, suggest times and create events, and are asked to check with you before making changes.
Calendar0 is an AI calendar app for the web, macOS, Windows and Linux. It shows Google, Outlook and iCloud calendars in one view from the menu bar or system tray, adds events from plain language, and can record calls for transcripts and notes.
Calendar0 has a Free plan, Pro at $8 a month billed $96 yearly or $10 month to month, and Founding Lifetime at a $149 one-time payment. Prices are listed in euros as well, and US buyers pay the same amounts in dollars.
Yes. Free includes unlimited Google, Outlook and iCloud accounts, quick add, booking links, 100 assistant chats and 3 recordings with transcripts and AI notes. No card is needed and the plan never expires.
It works with Google Calendar and Google Workspace, Microsoft 365 and Outlook, and Apple iCloud. Google and Microsoft sign in with OAuth, and Apple connects over CalDAV with an app-specific password.
Yes, in the desktop app on Mac and Windows. The first 3 recordings are free, and Pro and Founding Lifetime add transcripts and AI notes on every recording.
Yes. An MCP connector lets Claude, ChatGPT, Claude Code and Cursor read your calendars, suggest meeting times and create events. It is included on every plan, and you can disconnect an app in Settings under Connected apps.
Founding Lifetime is a single $149 payment that gives everything in Pro for as long as Calendar0 runs. Only 100 seats are sold, and it carries a 14-day money-back guarantee.
Calendar0 is built and run by Alessandro Afloarei through AFL Solutions, an independent software company. The site says it is not venture-backed and has no sales team.