A native macOS drawing app for quick sketches, screenshot markup, and AI-generated diagrams
AI UX intelligence system for product designers and founders
Stage
Not given
Startup
Founded
Not given
2025
Based in
Not given
IN
Pricing model
Freemium
Freemium
Pricing
Free: $0 forever, includes all drawing tools, unlimited sketches in one folder, copy to clipboard as PNG, and auto-save with local-first storage. Pro: coming soon.
Free: $0/month with 100,000 tokens (about 15 questions or 3 screen reviews). Pro Quarterly: $57 billed quarterly (about $19/month) with 1.9 million tokens (about 215 questions or 70 screen reviews). Pro Yearly: $131 billed yearly (about $10.92/month) with 1.9 million tokens.
Key features
Instant copy-to-clipboard as PNG
No accounts or setup required
Local-first storage with auto-save
Screenshot annotation with arrows, boxes, text, and freehand tools
AI diagram generation via Claude, Cursor, Windsurf, and VS Code
Refine diagrams through chat
Paste screenshot from clipboard
Unlimited sketches in one folder
Native macOS performance
All drawing tools included in free version
Ask UX questions and get answers citing verified guidelines
Audit screens measuring contrast, tap targets and text sizes from pixels
Library of 50 free UX laws and guidelines
Multiple AI model comparison for design analysis
UX prompt optimization
Unified consensus on design decisions
Projects that remember product context
Every finding cites its source guideline
Access to Claude Opus 5, Gemini Pro and Deep Research on Pro plans
What makes it different
Zero-friction design: open, draw, and share in seconds with no setup or accounts
Local-first architecture: all sketches stay on your Mac, nothing leaves unless you ask
AI integration runs through your own subscription with no proxying of prompts
Every finding cites a verified guideline, not an opinion or guess
Measures what it claims using pixel-level data, not guesses
Built by certified UX professional with 19 years of practice
Answers backed by universal UX/UI/CRO principles and human psychology research
Instant feedback at every stage instead of waiting days for design reviews
Chalk
ProUX