Use Case
Native performance for a lightweight reading experience.
A Mac Markdown viewer designed for understanding technical documents.
KatanA shines when you need to navigate through specs, ADRs, and release notes, not just looking at a single file.
01
macOS Focused
02
Quick Install
03
Full Docs
macOS Fit
Native App for both Apple Silicon and Intel
Stay lean while jumping into your daily documentation workflow.
comparison
Quick comparison
Comparison as of 2026.04.11
- Markdown review focus
- Faster technical-doc checking
- Diagrams for review, not editing
| Tool | Main focus | Startup/runtime | Price | Diagram handling |
|---|---|---|---|---|
| KatanA | Markdown review | Light | Free | Mermaid (including ZenUML) / PlantUML / .drawio |
| Typora | Markdown writing | Light | Paid (USD) | Mermaid-oriented |
| Obsidian | Knowledge base | Slow startup | Free | Mermaid built-in; .drawio via plugins |
| VS Code | General IDE | Depends on extensions | Free | Extension-dependent |
Use it when README / ADR / specs / release notes need to be reviewed as one flow.
Check Markdown, Mermaid (including ZenUML), PlantUML, and .drawio during review instead of editing diagrams by hand.
Ideal for you if...
- You want a Mac-native viewer instead of a browser-based one.
- You need to read docs with embedded Mermaid diagrams, including ZenUML sequence diagrams.
- You want quick access to GitHub, release notes, and documentation.