CatchUI
A screenshot tool that names every UI element
CatchUI tells you what that UI thing is called. Drop in a screenshot and it names every pattern inside it (bottom sheet, segmented control, toast…) with the evidence for each name, then saves them to your library for spaced-repetition review.
Behind it is a curated bilingual (English / 简体中文) catalog of 50 UI patterns, with component names for SwiftUI, UIKit, Compose, Flutter and HTML.
The catalog is also a free MCP server: add https://catchui.com/api/mcp to Claude, ChatGPT or Cursor. No sign-up, no API key.
Pricing & access
CatchUI has a free tier, with paid plans unlocking more. Free to start · Pro $6/mo. Check catchui.com for current plans.
Frequently asked questions
What is CatchUI?
CatchUI is a screenshot tool that names every UI element. CatchUI tells you what that UI thing is called. Drop in a screenshot and it names every pattern inside it (bottom sheet, segmented control, toast…) with the evidence for each name, then saves them to your library for spaced-repetition review. Behind it is a curated bilingual (English / 简体中文) catalog of 50 UI patterns, with component names for SwiftUI, UIKit, Compose, Flutter and HTML. The catalog is also a free MCP server: add https://catchui.com/api/mcp to Claude, ChatGPT or Cursor. No sign-up, no API key.
Is CatchUI free?
CatchUI has a free tier, with paid plans unlocking more. Free to start · Pro $6/mo.
What are the best CatchUI alternatives?
People comparing CatchUI also look at AppScreens, Framevine, Keepsake, (in)Dependence. See all options in the Design Tools category on SiftFox.
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