Desktop app · Windows & Mac
Download CYER
Proactive missions on your desktop. Local by default. Bring Claude or Codex when you want AI. No account needed to download — sign in later if you want billing or multi-machine sync.
Detected: Windows
Get the installer
Choose Windows or macOS. The button links straight to the build — no sign-in required.
Version — · unsigned beta
Optional account
Create an account to manage billing and keep your plan across machines. Notes and missions stay local on your desktop.
After you download
Install in five steps
- Download Pick Windows or macOS — no website account required.
- Run installer Accept SmartScreen or Gatekeeper for unsigned beta.
- Launch Cyer Onboarding: activity disclosure, optional news. Calendar coming soon.
- Optional sign-in Settings → Account if you want billing or the same plan on another machine.
-
Add a mission
Try
@missionor tray nudges.
What you need
- Windows 10/11 (64-bit) or macOS 13+
- ~200 MB free disk space
- Optional Claude Code CLI, Codex CLI, or Ollama
- Optional Claude Desktop + Node.js for MCP
Trust & checksums
Builds are unsigned beta. Windows may show SmartScreen — choose More info → Run anyway. macOS may block Gatekeeper — use Open Anyway in Privacy & Security.
- SHA-256 · Windows
- Published with each release
- SHA-256 · macOS
- Published with each release
Developers can compile from source on GitHub.