Free version includes pen, highlighter, eraser and whiteboard mode. Pro is $9.99 once and adds shapes, text and export; includes license for 5 Macs, all 1.x updates and 14-day refund.
Not given
Key features
Pen tool for drawing
Highlighter for emphasizing
Whiteboard mode
Drawings stick to windows as they move
Shapes (Pro)
Text insertion (Pro)
Export drawings (Pro)
Works on Zoom, Meet, Teams and presentations
Fully editable vector ink
Three-coin casting method for generating six-line charts
Rule-based chart calculation with stem-branch assignment
Optional AI-assisted interpretation of results
AI follow-up questions and conversation feature
Local browser storage for reading history
Hexagram judgments and images reference
Multi-language support including English, Chinese and Spanish
What makes it different
Drawings automatically stick to windows and follow them when moved or resized
Works invisibly without accounts, analytics or tracking
Free version includes core features; Pro is one-time $9.99 purchase not subscription
Native Mac app engineered for Apple Silicon
Pro license covers up to 5 of your own Macs
Transparent rule-based chart calculation that AI cannot alter
All charting happens locally in your browser for privacy
JellyDraw
Agua