Cross-platform calendar app with intelligent cross-calendar time management.

I'm building Sundy because:

• I want to - it's a passion project that excites me
• I need specific features I've wanted for a while:
  • Seamless cross-calendar integration and management
  • ADHD-friendly features to help with time management
  • Smart features to prevent missing meetings
  • Reliable, configurable notifications
• Daily use - this solves real problems I face every day
• Speed matters - I want a fast, lightweight experience
• Privacy-first - my data stays mine, always

Here's my reality:

• I have a Gmail calendar
• I have multiple Outlook calendars
• Some things sneak into my Apple Calendar
• My wife uses Reminders and the paper calendar on our wall

And here's what happens:

1. Calendar A gets blocked, but B and C don't know about it
2. Calendar B gets scheduled later and silently conflicts with A
3. Calendar C's notifications are muted, or I only see Calendar A because that's my work computer
4. Where do I put family events? Doctor appointments for me, my wife, the kids... all of them?
5. No easy way to navigate all of this—add ADHD and object permanence issues and... "Oops, sorry, can't make that meeting today"
6. "Hey, are you joining the meeting?" — "Oh crap! I didn't get that notification!"

• Offline-first - works without an internet connection
• Fast & responsive - efficient rendering and sync
• Privacy-focused - your data stays yours
• Clean, minimal UX - no clutter, just what you need

Try the browser version: https://try.sundycal.com

Note:

• This is a very basic demo of the browser version, which is not as well tested as the desktop version
• The browser version may be slower and have a larger footprint than normal
• Data is stored in memory and will not be persisted

• .NET 10.0 SDK or later

1. Clone the repository:

   git clone https://github.com/codymullins/Sundy.git
   cd Sundy

2. Restore dependencies:

   dotnet restore

3. Run the desktop application:

   dotnet run --project src/Avalonia/Sundy.Desktop/Sundy.Desktop.csproj

Alternatively, you can navigate to the desktop project directory and run directly:

cd src/Avalonia/Sundy.Desktop
dotnet run