Your agent ships the first cut: fast, functional, generic. nitpin is where you redline it.
$39 early-adopter price · own it once, no subscription.
The machine writes the first cut. It works, and it's generic crafted. nitpin is the half-second of polish in between.
A hotkey freezes the pixels of whatever window you're driving. You drop pins and notes on the frozen still; your coding agent reads them over MCP and clears them, one detail at a time.
Press ⇧⌘6 over any window: a browser, the iOS Simulator, an Electron app, even a menu that vanishes the moment you click. nitpin freezes its pixels and never so much as touches your app.
Drop pins and regions, then write the note: "this button sits 3px low," "spacing's off here." One note can cover several spots, and you can paste a reference image right in.
Claude Code, Codex, or Cursor pulls the findings over MCP, looks at the marked-up screenshot, edits the code, and checks each one off. Point a few agents at the backlog at once.
Every pin lands in the Explorer as a finding. Your agents claim them, fix the code, and resolve them, and the list keeps updating live while you keep capturing.
The other tools that hand UI feedback to your agent stop at the browser tab. nitpin captures any window on your Mac, so it reaches the apps they can't even see.
Refine your SwiftUI app where it actually runs.
AppKit, Catalyst, Electron: any macOS window.
An embedded surface with a DOM element picker.
Hover states, menus, popovers, caught mid-flight.
Local-first, on-device, no backend. Everything lives in a plain file store on your Mac. nitpin only reads pixels and window titles; it never clicks, types, or navigates anything.
Each capture is a report; each note over its pins is a finding with its own status and priority. Resolve them one at a time.
Claims and git worktrees let several agents work the backlog at once without stepping on each other.
Group a noisy backlog into themed clusters, by hand or with an agent, then assign a whole cluster at once.
The free nitpin reader plugs into Claude Code, Codex, Cursor, and more with one command.
Reports name themselves with on-device Apple Intelligence. Nothing leaves your machine.
The Explorer updates as your agents work: findings resolve and claims appear in real time, no refresh.
One app, one purchase, the way Mac apps used to be sold. Pay once and it's yours. The agent-side reader is free, and installs in a single line.
Early-adopter price. One purchase, up to 3 Macs.
Get in before launch and your $39 stays $39.
The nitpin MCP reader, for every developer and every agent.
The app creates the findings. The reader fixes them. You only pay for the app.
The first cut is machine-generated. The craft is yours.
Lock in $39 early access