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How to improve an existing app screen against category leaders with Appllama Skills

Give an agent a screenshot, code, or Copy Screen ID and have it rebuild the screen to a higher bar.

Reverse engineering. Matching a category's design language is the goal, so avoid copying distinctive screens or assets from the apps you study.

Who it is forAn app developer whose screen feels off or dated and who wants a concrete redesign grounded in what top apps do.

The problemIt is hard to tell which parts of a screen are weak or what better screens in the same category actually do.

The outcomeA revised screen in code, plus a short explanation of which patterns from the category were applied and why.

What you need first

  • An MCP-capable agent such as Claude Code, Cursor, or Codex
  • An Appllama account with Pro, since MCP access is part of Pro
  • An Expo / React Native project and a simulator for the build loop

Steps

  1. Run npx skills@latest add appllama/appllama-skills from your project root.
  2. Connect the Appllama MCP at https://mcp.appllama.io/mcp and approve it with your Appllama account.
  3. Collect the screen as a screenshot, its code, or a "Copy Screen ID" reference from appllama.io.
  4. Ask your agent to use the appllama-usage improve-a-screen playbook and the appllama-app-design-skill build bar on that screen.
  5. Compare the before and after simulator recordings and keep only the changes that hold up next to the category screens.

Prompt for your agent

Using the appllama/appllama-skills repo, take the screen at <screenshot, code path, or Copy Screen ID> and improve it against the top-grossing apps in its category through the Appllama MCP. Output the revised screen code and a list of changed patterns, and verify the result in the simulator before reporting it.

Caveat. The README says the design skill is sharper with the MCP connected, so the research step adds value only when the MCP is set up and credited.

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