ButterKit

ButterKit is a native macOS application built for developers who need to create, localize, and publish App Store screenshots and metadata without juggling multiple tools. Everything happens in one place, so shipping polished store listings feels far less like a chore.

Capture screenshots directly from the Xcode Simulator, or import images from folders and Fastlane workflows you already use. Drop them into editable 3D device frames, then refine each shot with templates, fonts, gradients, backgrounds, and a full set of design tools until every screen looks just right.

Going global is simple: ButterKit translates your screenshots and App Store metadata into up to 50 App Store languages, lets you preview localized listings before they go live, batch-exports assets, and uploads designs directly to App Store Connect.

Work the way that suits you best. ButterKit supports fully offline workflows and on-device translation for privacy and speed, offers AI agent automation through MCP, and delivers Metal-powered editing at up to 120 frames per second for a fluid, responsive design experience.