Documentation

Documentation

Video Tutorials

Basics

Product intro with Zach (2 min)

Product intro with Zach (2 min)

Capture screenshots from Xcode Simulator (2 min)

Capture screenshots from Xcode Simulator (2 min)

AI Integration

Cursor AI Setup (2 min)

Cursor AI Setup (2 min)

Claude AI Setup (2 min)

Claude AI Setup (2 min)

OpenAI Codex Setup (2 min)

OpenAI Codex Setup (2 min)

What is ButterKit?

The smooth way to publish apps to the App Store. It handles the tedious work for you:

  • Generating polished, professional App Screenshots
  • Providing templates for starting quickly (or build from scratch)
  • Translating into all 50 App Store Connect localizations
  • Managing and translating metadata (App Description, Promotional Text, and “What’s New”)
  • Uploading everything to App Store Connect directly, or exporting to images etc
  • And more

All with no accounts, no ads, and a one-time purchase option so you can own your tools.

Who is it for?

  • Apple developers and designers (Google Play Store has partial support too)
  • Founders & studios who value speed, quality, and software ownership

Under the hood

  • Realtime 3D rendering built on Metal for 60/120fps performance on M-series Apple Silicon (Intel works too)
  • Photorealistic 3D devices to frame your app (iPhone/iPad/Mac/Pixel Pro)
  • Infinite canvas, gesture support, Undo/Redo, light/dark modes, and much more
  • Pro-designed templates you can tweak

Getting Started

Capture & Import

ButterKit integrates directly with Xcode Simulator, capturing your screenshots and immediately framing them into photorealistic devices. Or you can link a folder of images (e.g. via Fastlane or UI testing automation) and ButterKit applies the images automatically for you. Or just drag individual screenshots onto the 3D devices to apply them.

Design

A growing library of professionally designed templates make it easy to get a professional look quickly. Or start from scratch. Adjust 3D rotation, background colors, gradients, full text/font support, and more.

Translate

ButterKit does the heavy-lifting for you, translating using the on-device ML-powered translation engine for 20 languages, or using OpenAI for all 50 App Store Connect languages (Pro feature). It does this while retaining your design constraints so text looks great in all languages.

Publish

Upload directly to App Store Connect using the built-in uploader, or batch export all of your screenshot images into neatly organized folders.

System requirements

  • Operating System: macOS 15.6+
  • CPU: M-Series recommended (Intel works too)

Quick Help