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.