Is crystl free?

Yes. The free tier includes isolated shards and parallel sessions, floating cards, the agent activity panel, split view, the history navigator, token tracking, the workbench, project optimizer, the agent file editor, screenshot and copy bars, MCP servers, API key storage, remote development over SSH, Metal-accelerated GPU rendering, facet inserts, and agent scheduling (up to 3 schedules). The Guild plan ($170/year or $18/month) adds the Prompt Library integration, formations, CLI orchestration (the control commands), unlimited scheduling, the iPhone app from anywhere, up to 3 devices, and priority support. See Licensing for the full split.