Problem
I teach high school computer science, and for about 15 years I've been recommending Paint.NET to my Windows students. Last February I finally got fed up with the fact that the Mac still doesn't have a proper equivalent.
So I built one. DrawSimple is a native Mac paint-and-draw app, very much in the MacPaint/MacDraw tradition. Tools down the left, layers, brushes, editable vector shapes, photo adjustments. Written in Swift and AppKit, not a web wrapper.
But something unexpected happened along the way.
In April, I was working on the heart shape tool (hearts are surprisingly complicated!) and getting thoroughly sick of drawing dozens of hearts every time I changed something. So I asked Claude Code to add a little localhost server and MCP bridge, basically so it could operate the app for me while I tested.
The first test session ended with Claude painting me a picture. I still have the chat log. My response was "I LOVE your painting!"
That little "testing shortcut" has since been rebuilt, optimized, audited and trimmed more than almost anything else in the app. And I've come around to thinking it's the best feature. Since launching in August, it's certainly been the one people have been most excited about.
The attached image is a mockup for a card for a card game I'm working on, drawn by Claude Opus in about 10 minutes. Once Claude finished designing it, I jumped in, created the "fanout" and edited it until I was happy. That's the DrawSimple experience.
Competition
vs. Paintbrush (free): Paintbrush is probably still the closest thing to the old MacPaint, and I have a soft spot for it. But it's pretty basic. DrawSimple has layers, vector shapes, adjustments, effects, and a lot more. Neither is trying to be Photoshop.
vs. Pixelmator Pro ($49.99): Pixelmator is a much more capable professional image editor. I'm not going to pretend my $5 app competes with it on every feature. If you need a serious photo editor, Pixelmator is excellent. DrawSimple is aimed more at the Paint.NET crowd: people who want a proper set of tools without the complexity or price of a professional graphics package.
vs. AI image generators: This is where things get interesting. Image generators can make some incredible pictures, but you generally get a finished image. If you want to move a button, resize a shape, change a gradient or edit some text, you're largely back to square one.
DrawSimple takes a different approach. The AI operates the actual drawing tools. Strokes, shapes, gradients, text, selections, layers and effects. The same tools I use with my mouse.
There isn't a separate AI canvas or some special AI-generated document format. Everything happens in the regular editor, and every action goes into the same History panel as your own work. You can even ⌘Z through an AI's drawing session, pick up your mouse and carry on yourself.
And importantly, DrawSimple doesn't generate anything itself. There's no built-in model. You bring your own assistant. Claude Code, Claude Desktop, Codex, Gemini, anything that speaks MCP. I've personally had Claude, Codex and Gemini painting through it, as well as some local models.
The MCP server is entirely local, disabled until you turn it on, and restricted to 127.0.0.1. DrawSimple never sends anything out. Obviously, if you're using a cloud-based assistant, anything it reads from the canvas may be sent to that model's provider. I want to be clear about that distinction.
Pricing
$5 once. No subscription, no account.
That includes the complete core paint editor, the MCP server and all 12 MCP tools. Your assistant can paint, draw shapes, add text, use gradients, work with selections, apply basic effects and export PNGs.
There's an optional $10 Pro unlock for advanced features, including AI manipulation of editable vector objects, large multilayer compositions, unlimited batch operations and JPEG/SVG/PDF export.
To clarify one potentially confusing point: you can draw and edit vector shapes yourself in the $5 version. It's specifically having the AI manipulate those editable vector objects that requires Pro.
No subscription, no AI credits to buy, and no model included. Use whatever MCP-compatible assistant you already have.
macOS 15.6 or later. Apple silicon and Intel.
App Store: https://apps.apple.com/app/id6759507748?mt=12
I'm the developer, and I'll be around all day if anyone has questions. I'm particularly interested in hearing what people would actually want an AI to do inside a conventional drawing app.