Built by a design engineer.

Dad. Hiker. Creator of ButterKit.

I'm a design engineer building ButterKit from my home office in California. I've cofounded startups (one was acquired), landed on Inc. Magazine's 30 Under 30 list, and spent years shipping software across the App Store and the open web. These days, all of that experience goes into one thing: building tools I'd actually want to use myself -- and making sure it stays that way.

Why I built ButterKit

Years ago, I was shipping my own iOS apps and there was one part of the process I genuinely dreaded: App Store screenshots and localization. Every release meant hours in Figma, manually placing screenshots into device frames, duplicating artboards for every language, exporting dozens of images by hand. It was busywork, and it had nothing to do with making my app better.

So I built a small utility to automate it. Capture from the simulator, drop into a 3D device frames, translate the text while keeping the design intent, and export everything at once. That utility became ButterKit.

Today it helps thousands of developers and designers around the world ship polished App Store pages in a fraction of the time. But the reason it exists hasn't changed: I build the tool I want to use. And I use it daily. That's the filter for every feature, every design decision, every thing I say no to.

In a world where most software is shaped by engagement metrics and growth-at-all-costs thinking, I think there’s real value in a tool that’s shaped by the person who uses it every day and offered at a fair price. That’s what I want ButterKit to be.

The ButterKit 3D rendering engine runs at up to 120fps. Not because a product roadmap called for it, but because anything less felt wrong. I hand-tune shadows, bezels, and lighting angles. I care about how an export feels when it finishes. That's the kind of detail that separates a tool you tolerate from one you enjoy using.

Independent on purpose

Something has gone wrong with software. You've felt it. The app that made it hard to cancel or quietly raised its price after you were locked in. The "free" tool that mines and sells your data.

I'm old enough to remember when great software could be purchased once and a subscription meant you were supporting a developer who kept making the thing better, not feeding a growth machine. I still believe you can build something honest, charge fairly for it, and keep improving it without manipulating the people who trust you with their work.

ButterKit is independently funded: no investors, no board, no pressure to chase growth at the expense of the people who actually use it. That independence is the whole point. It means I can keep the free tier generous, offer a one-time purchase, skip the upsell nags, and never sell your data. It's the only way I want to build software. Read the mission statement

If you ever have questions, feedback, or just want to say hello, my inbox is always open. I read every message.

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Zach Spitulski
Creator of ButterKit