What is ButterKit?

ButterKit is a native macOS app that serves as an App Store screenshot studio. It lets developers capture screenshots directly from the Xcode Simulator or import from folders/Fastlane, place them in photorealistic 3D device frames, auto-translate them into all 50 App Store languages, and bulk-export or upload directly to App Store Connect. It also supports AI/MCP automation and includes pro design tools and templates.

How to use ButterKit?

Download ButterKit for macOS and open it. Capture screenshots directly from the Xcode Simulator or drag and drop PNG/JPG images, or link a folder (e.g. Fastlane). Place images into 3D device frames and style them with templates, fonts, gradients, and backgrounds. Auto-translate screenshots and metadata into App Store languages, then batch export or upload directly to App Store Connect. Optionally connect AI agents via MCP for automation.

Core features of ButterKit

Capture screenshots directly from Xcode Simulator
Drag-and-drop or link folders (e.g. Fastlane) for image import
Photorealistic 3D device frames with Metal-powered editing up to 120fps
Auto-translate screenshots and metadata to all 50 App Store languages
Pro design tools: fonts, gradients, backgrounds, templates, and community marketplace
One-click batch export and upload to App Store Connect
AI/MCP automation support for agents like Cursor, Claude, and OpenAI Codex
App Store preview across devices and languages