ButterKit

New to the App Store! ButterKit is a pro tool for devs & designers: Capture from Xcode Simulator, edit in 3D, localize/translate, and bulk export for the App Store in minutes.

Ship App Store screenshots without the busywork. ButterKit is a Mac-native studio for developers and designers to capture straight from Xcode Simulator, compose in a realtime 3D renderer with photorealistic devices, translate, and batch-export. It’s fast, precise, and private – built on Metal with no accounts and no subscriptions.

Apple M1 or newer is recommended for best performance.

KEY FEATURES

• App Store Screenshot Design Studio: pro typography, gradient tools, and precise 3D device controls (style, bezel, rotation, scale).

• Professional Templates: designer-built layouts make screenshots look polished in minutes.

• Simulator Capture: pull directly from Xcode Simulator and keep pixel-perfect device geometry and safe areas.

• Automatic Translations: use built-in translations for 20+ languages, or bring your own OpenAI API key to translate to all 39 supported ASC languages.

• Batch Export: with correct sizes, locale mapping, and consistent file naming for faster App Store Connect uploads.

• Built for Real Workflows: infinite canvas, keyboard shortcuts, undo/redo, file saving, custom fonts, gradients, and style presets.

• Mac-native, Metal-accelerated: buttery-smooth editing with a realtime 3D renderer and lifelike iPhone, iPad, and Mac device frames.

• Private by Design: all core features run on-device. No logins, no tracking, no recurring fees. Optionally use your own API keys for additional translation options (Pro feature)

• One-time Purchase: own your tools; because who wants another subscription?

BUILT FOR DEVS & DESIGNERS

ButterKit streamlines the full pipeline from capture, edit, translate, and export – so you spend time refining your product, not wrangling artboards.

REALTIME 3D, ZERO WAIT

Rotate, frame, and light photorealistic devices in a GPU-powered viewport. What you see is what you ship: responsive, precise, and smooth.

LOCALIZE WITHOUT LAYOUT DRIFT

Translations automatically respect typographic rules and constraints, keeping captions readable and aligned across all localizations.

PRIVACY & OWNERSHIP

It all happens on your Mac. No accounts to manage and no subscriptions. Just a fast, focused tool you buy once.

UPGRADE TO PRO (NO SUBSCRIPTIONS)

• Remove watermark on exported images

• Unlock OpenAI API (bring your own key)