Graph Sketcher
Sketch economics graphs by hand — clean Bézier curve
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Graph Sketcher - Sketch economics graphs by hand — clean Bézier curve

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Graph Sketcher is a Mac app that converts your freehand sketches into clean, polished graphs in real time. Draw a supply curve, a cost curve, or any economics diagram by hand on the canvas — and it instantly smooths into a clean Bézier curve. Add text labels, fill enclosed areas, and export as PDF or image for slides and handouts. Built for educators and students who need to create economics diagrams quickly — without fighting PowerPoint or Illustrator.

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Hi Product Hunt! 👋 I'm Masa, an economics professor and indie Mac developer. For over a decade, I relied on Omni Graph Sketcher to create diagrams for my lectures — supply & demand curves, indifference curves, cost curves. When it was discontinued and stopped working on modern macOS, I couldn't find a proper replacement. PowerPoint is too tedious. Illustrator is overkill. Nothing filled the gap. So I built Graph Sketcher myself. The core idea is simple: you draw freehand on a canvas, and the app instantly converts your lines into clean Bézier curves. It feels natural — like sketching on paper — but produces presentation-ready output. What it does: Freehand → clean Bézier curves, instantly Add text labels anywhere on the canvas Fill enclosed areas with color Export as PDF, JPG, or TIFF Document-based, native macOS app (Sonoma+) It's a one-time purchase at $17.99, with a free 3-day trial so you can try everything before buying. I'd love feedback from educators, students, or anyone who draws technical diagrams. Happy to answer any questions!