PrivyMermaid Pro: AI Diagram

Private AI Diagram Assistant

$4.99 · Designed for iPad. Not verified for macOS.

PrivyMermaid Pro 0.11.0 unfolds with you: on iPhone Duo, the editor and live preview sit side by side. Updated diagram engines, a refreshed Diagram Cloud sign-in. PrivyMermaid Pro combines offline Mermaid and D2 diagramming with private AI assistance from your own local LLM. Create, import, edit, organize, preview, and export diagrams on iPhone and iPad. The Mermaid and D2 renderers are bundled in the app, so diagrams preview without an internet connection. When you enable AI, PrivyMermaid Pro connects directly to the Ollama server you configure on your local network—your prompts and diagram source are not sent to a public rendering service. Pro Features: Private AI Assistance Generate diagrams: Describe a workflow or system in plain language and let your local AI create Mermaid or D2 source. Ask and fix: Ask about a diagram, repair invalid source, or refactor an existing diagram while preserving your intent. Local network connection: Connect to your Ollama server on your LAN (for example, http://192.168.1.x:11434). Streaming responses: Follow generated source as it arrives in the editor. Diagramming Features Included: Mermaid + D2: Create and preview two diagram languages locally, from flowcharts and sequence diagrams to D2 architecture diagrams. Projects and templates: Organize documents in projects and start from built-in Mermaid or D2 templates. Live preview and export: Choose a theme and background, then export Mermaid (.mmd) or D2 (.d2) source, SVG, PNG, PDF, or GIF. Optional Diagram Cloud sync: Sign in only if you want to sync diagrams to your Diagram Cloud account. Local copies remain available offline. Why PrivyMermaid Pro? Spend less time on diagram syntax and more time on the architecture. PrivyMermaid Pro keeps rendering offline and lets you choose when to use AI through your own local model. Requirement: A running instance of Ollama on your local network/machine is required to utilize the AI features.

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Built for iPhone Duo — Unfolded, the editor and live preview share the screen and split around the fold. In tabletop posture, the preview stands on the upper half while you type on the lower half. Updated diagram engines — Mermaid 12, PlantUML, and Graphviz are updated. Your existing Mermaid diagrams keep their familiar look; PlantUML sequence diagrams use PlantUML's newer default layout. Smaller download — The PlantUML runtime is less than half its previous size. Fewer render errors — Diagrams that mention a URL in a label or link now render instead of being rejected, including ones from Generate and Fix. Links stay inside the preview. Diagram Cloud — Updated sign-in components for more dependable session restore.

The developer, GUOYU WANG, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    GUOYU WANG
    Size
    31.8 MB
    Category
    Developer Tools
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 9 more
    • English, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
    Age Rating
    4+
    Copyright
    © 2026 GUOYU WANG