I am Alessandro Afloarei and I am so happy to show you Calendar0. Calendar0 is a calendar app for the web, plus a tray/menu bar app for macOS, Windows and Linux.

It shows Google, Outlook and iCloud calendars, lets you add events quickly, has booking links, and can record and transcribe calls.

I started it in September 2025 as a hobby project for keeping all my calendars in one place, easy to reach, and over the last months I added so many new features to it.

A few details that might be interesting:

Quick add uses a mix of chrono, Jev and Gemini. It is also capable of automatically adding guests from names.

Recording captures the mic and the system audio (no bots) and uses AssemblyAI for the transcription. Afterwards, the audio file is deleted.

There's also an MCP server, so you can connect it to Claude or ChatGPT and ask about your week or meetings.

To try it you have to sign in and connect a calendar, since it can't do much without one. It is mostly free (quick add, booking links, MCP connector). I ask for an upgrade only where I actually pay myself for the feature itself, e.g. meeting transcription.

I have so many feature ideas in mind, like connecting Linear tickets to each event and add support for tasks.

I'd love to hear your feedback on the project!

Thanks a lot, Alessandro