We build software that gets the answer right.
VSG Design is a small, independent studio that designs, builds and ships software — from the first sketch to a listing on the app store. Right now that means precise, well-tested mobile apps. Next, it could mean yours.
Apps we’ve built
One app live on Google Play and three more in active development. Every release is backed by an automated test suite before it ships.
Geometry Solver
AndroidA geometry calculator built like an engineer’s workbench. Enter the measurements you already know — a side, a radius, an angle, an area — and it solves every remaining dimension for you.
Covers triangles, polygons, circles and ellipses, plus a full range of 3D solids, with a precision model that tracks where each number came from.
Seven Boards of Skill
Android · iOS plannedA tangram puzzle game (七巧板, qi qiao ban) built on an exact geometry kernel — no rounding, no “close enough”. A solve is recognised only when the shape is mathematically identical.
An endless, deterministic puzzle generator across three difficulty tiers, alongside a curated set of historical figures.
Project Three
To be announcedA third title is in the workshop and not ready to be named yet. Details will land here once it’s closer to a release.
Project Four
To be announcedAnother project in progress. We announce apps when they’re close enough to ship that the date means something.
Got an app you want made real?
That’s the service. Bring an idea — a rough sketch, a spreadsheet you’re tired of maintaining, a tool you wish existed — and we’ll scope it, build it, and put it in the store under your name or ours. You work directly with the developer writing the code. No account managers, no handoffs.
From idea to store listing
Tell us the idea
Email or the form below. Rough is fine — a paragraph and a problem worth solving is enough to start.
Scope and estimate
We come back with what it would actually take: features, timeline and a straight price. No obligation.
Build, in the open
Regular builds you can put on your own phone, so you see the app taking shape instead of waiting on a reveal.
Ship and support
Store listing, privacy policy, compliance paperwork and launch — then updates and fixes once it’s live.
What we work in
- Mobile appsNative Android in Kotlin and Jetpack Compose, with shared cross-platform cores for iOS.
- Precision-critical toolsCalculators, engineering and scientific software where a rounding error is a real bug, not a rounding error.
- Games & puzzlesOriginal mechanics, generated content and the maths engines underneath them.
- Python tooling & automationData pipelines, research tooling, scrapers and the unglamorous scripts that save real hours.
- Store readinessListings, assets, privacy policies, consent and the compliance work that keeps an app published.
A small studio that sweats the details
We are VSG Design, LLC — a registered Michigan limited liability company.
Correctness first
Our flagship app runs hundreds of automated checks before every release, and uses exact arithmetic wherever floating point would quietly lie. That habit carries into everything we build.
You talk to the builder
Small by design. The person answering your email is the person writing the code, which means straight answers about what is easy, what is hard, and what isn’t worth doing.
Shipped, not just built
Getting an app finished is only half the job. We handle store submission, policy requirements and the long tail of updates that keep software alive after launch.
Let’s talk about your app
Whether you want something built or you need help with one of our apps, this reaches us directly. We answer every message.
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2222 W Grand River Ave, Ste A
Okemos, MI 48864-1604
United States