ButterKitvs.Helm
A screenshot design engine vs. an App Store Connect client. Do you need one, the other, or both?
TL;DR
Helm is a native macOS and iOS app that replaces the App Store Connect website for managing metadata, reviews, TestFlight, and ASO. ButterKit is a design-focused App Store publishing tool — design screenshots with 3D mockups, translate and manage metadata across all 39 languages, and publish directly to App Store Connect. They solve different parts of the App Store pipeline and work great together.
How does ButterKit compare to Helm?
Detailed comparison
App Store screenshot design
ButterKit is a full screenshot design studio. Pick a template, customize backgrounds, add caption text, and place your app inside photorealistic 3D device frames — all rendered in real-time with Metal at up to 120fps. One design change propagates across every language and device size automatically.
Helm
Helm doesn't design screenshots — it manages them. You bring pre-made screenshot files and Helm handles uploading, arranging, and validating them for App Store Connect. You'll need a separate tool (like ButterKit, Figma, or Photoshop) to create the screenshots themselves.
App Store Connect management
ButterKit manages and translates your app metadata (description, what's new, keywords) across all 39 App Store languages and uploads everything — screenshots and metadata — directly to App Store Connect. It doesn't cover review responses, TestFlight, or submission management.
Helm
This is where Helm excels. It's a comprehensive App Store Connect client — up to 12x faster than the ASC website. Manage metadata across all localizations, respond to reviews with AI assistance, handle TestFlight builds and testers, submit for review, and get a launch checklist so nothing is missed.
Localization & translation
Translates both screenshot captions and app metadata to up to 39 App Store languages with one click. On-device translation (18 languages) is free; cloud translation with customizable creativity is available with Pro. String Catalog localization support is coming soon, extending ButterKit's translation engine to your app's UI strings.
Helm
Translates app metadata — descriptions, release notes, keywords, and more — with AI-powered tools. Apply your base language text to all supported languages with a single click. Also auto-translates incoming App Store reviews so you can understand feedback in any language. Translation requires Pro.
Screenshot uploading
Designs, exports, and uploads screenshots in one seamless flow. Because ButterKit creates the screenshots, it already knows the correct sizes and locales — upload to App Store Connect directly without any manual file management.
Helm
Helm's "Magic upload" takes existing screenshot files and automatically places them in the right size, locale, and order. It arranges, validates, removes alpha channels, and supports visionOS simulator screenshots. Great for managing screenshots created in any external tool.
ASO & discoverability
ButterKit focuses on the visual side of ASO — creating eye-catching screenshots that improve tap-through rates. It doesn't include keyword analysis or text-based ASO tools.
Helm
Helm provides dedicated ASO tools: duplicate keyword detection, expert advice for optimizing your title, subtitle, and keywords, plus a preview of how your app appears in App Store search results. Also supports creating App Store feature nominations to get editorial attention.
Pricing & ownership model
- Free: Unlimited projects, templates, watermarked exports
- Pro: $49 lifetime or $20/year
- No per-seat pricing. One license, up to 5 machines.
Helm
- Free: 6 app submissions per year, limited features
- Pro: $4.99/month, $49.99/year, or $174.99 lifetime
- Team licenses available for purchase.
ButterKit runs entirely on your Mac — no servers, no storage costs — which makes sustainable one-time pricing possible. Helm connects to App Store Connect's API and uses AI for translations and text improvements, which drives its subscription model.
Platform & performance
Native macOS app built with Swift and Metal. Works completely offline, requires no account, and delivers up to 120fps 3D rendering on Apple Silicon. The trade-off: macOS only (15.6+).
Helm
Native app for both macOS (Sequoia 15.0+) and iOS (18.0+). Requires an Apple ID for App Store Connect access. The iOS companion app means you can manage submissions, respond to reviews, and check build statuses from your iPhone — something ButterKit can't do.
Who each tool is best for
Choose ButterKit if…
- You need to design App Store screenshots from scratch
- You want photorealistic 3D device mockups without plugins
- You need auto-translation for screenshots and metadata
- You want metadata management and ASC uploads without a full ASC client
- You want Xcode Simulator capture built in
- You prefer a one-time purchase over subscriptions
- You want CI/CD automation with Fastlane
Choose Helm if…
- You want a full App Store Connect replacement
- You need to manage and respond to App Store reviews
- You want TestFlight build and tester management
- You need ASO insights like keyword analysis and search preview
- You manage multiple apps or development teams
- You want to manage submissions from your iPhone
The bottom line
ButterKit and Helm aren't really competitors — they're a great pair. Use ButterKit to design stunning, localized App Store screenshots and metadata. Use Helm to manage everything else in App Store Connect: reviews, TestFlight, and submissions. Together they cover the entire pipeline from screenshot to ship.
Don't take our word for it
"ButterKit is, by far, the best app for this. It has sped up my workflow 100x."
"I've tried so many screenshot tools and they were all too complex. I understood how to use yours in just 10 seconds."
"My conversion rates have improved substantially with ButterKit."
Join developers
around the world!
Whether you're launching your first app or your hundredth update, ButterKit helps you reach more users faster - and smoother.
Download for freemacOS 15.6+
Looking for more options? Browse all comparisons
Helm is developed by Anima Software and is not affiliated with ButterKit. Information on this page was researched and published on February 10, 2026. Features, pricing, and availability may have changed since then.