PlantUML App 3.3.0

This is a native PlantUML editing application designed for iPad, offering a practical tool for diagram creation on the device. The app incorporates AI functionalities to assist in the drawing process; however, users must possess a valid OpenAI API key—specifically, an active paid account—to enable these features.

Features include:

1. Creation, updating, and deletion of PlantUML documents.
2. Document sharing via iCloud integration.
3. OpenAI integration:
   • Note: Activation of AI features requires a valid OpenAI API key stored securely in the device's keychain.
   • Drawing tools:
     • Draw diagrams using either Pencil or fingers.
     • Process hand-drawn diagrams through the OpenAI Vision API (gpt-4o) to automatically generate PlantUML scripts.
     • The generated PlantUML script includes a legend with detailed descriptions of the drawing.
   • Prompt-based diagram requests:
     • Enter natural language prompts to generate or modify diagrams.
     • Undo prompt actions.
     • Access prompt history.
     • Select AI models (gpt-3.5-turbo or gpt-4) for processing.
4. Text editor with:
   • Auto-save functionality.
   • Syntax highlighting and auto-completion for diagram snippets via the Ace editor.
5. Diagram preview:
   • Relies on the PlantUML online server, thus requiring an internet connection.
   • Built-in cache management for improved performance.
   • Options to scale diagrams to fit the viewport.
   • Image sharing capabilities via AirDrop, iCloud, or other applications.