ButterKit is a powerful native macOS application designed to streamline the entire process of app store publication and localization for Apple developers.
Its standout feature is the ability to capture high-quality screenshots directly from the Xcode Simulator and embed them into photorealistic 3D device frames, providing professional visuals for App Store listings.
What makes ButterKit particularly impressive is its multilingual support: it can translate app descriptions and metadata into all fifty App Store Connect languages utilizing frontier AI models, or into eighteen languages for free through on-device Apple Silicon processing.
Users can effortlessly upload their assets directly to App Store Connect via the API, simplifying what is traditionally a complex workflow.
The app offers flexible templates and the ability to start from scratch, with features that support entire folders for input and output—making integration into existing CI/CD pipelines seamless.
Additional customization options include adding custom fonts and 3D callouts, enhancing visual appeal.
Its MCP support allows AI coding tools to automate tasks further, reducing manual effort.
By simplifying localization, ButterKit enables apps to appear in native languages across every supported market, vastly increasing visibility and potential reach.
Built by a solo developer for fellow developers, ButterKit offers an efficient and user-friendly solution for elevating app presentation and global reach.
