Calendar0

What it does

Calendar0 is a system tray app with AI scheduling. Type "lunch with Sarah tomorrow": it finds her email, checks availability, books it. One-click calendar access. One-click meeting join. No more browser tab chaos.

Stop switching windows to check your calendar. See your full schedule with one click. Schedule meetings by typing what you think. Calendar0 lives next to your clock—no browser needed. Get your 20 minutes back.

You open three browser tabs to check. Takes 4 minutes. You forget the bug fix you just figured out. You search for the meeting. Check everyone's calendar. Send three emails. Your morning productivity is shot . You scramble for email addresses. Check Slack. Search the directory. Your boss is waiting . Automatic conflict detection. Smart scheduling. Protected focus time. Save 20 minutes every single day. Type 'lunch with Sarah tomorrow'. Calendar0 finds Sarah's email. Checks everyone's availability. Sends the invite. Done. Personal calendar. Work calendar. Shared calendars. See them all at once. One view. Zero switching. Add buffers to back-to-back meetings instantly. Select multiple events…from calendar0.app

In the maker’s words, at launch

Hey HN! I'm the creator of Calendar0, a menubar calendar for MacOS and Windows that I've been working on for the past few months. The app is designed to make calendar management actually accessible without opening a browser every time you need to check your schedule. One of Calendar0's main goals is to eliminate the…

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