About the studio · U.S. Navy veteran-owned
GrayStone Development Studios
A U.S. Navy veteran-owned software and game studio in Geneva, Illinois. We build custom software, web and mobile apps and integrations for businesses, and we make card games people play for fun.
Who we are
GrayStone Development Studios, LLC is a small, independent studio based in Geneva, IL 60134, in the Fox Valley west of Chicago. It is owned and run by Matt Stonewall, a U.S. Navy veteran who served aboard the aircraft carrier USS Abraham Lincoln (CVN-72) and later at Fleet Training Center Treasure Island in San Francisco, and it works the way the Navy taught: plan carefully, write things down, test before you ship, and own the result.
When you work with GrayStone, you talk directly to Matt, the person who designs and writes your software. There’s no sales layer and no offshore handoff. Call or text him at 630.440.1615.
What we do
- Custom software built around how a business actually runs, replacing spreadsheets and manual steps.
- Web apps: customer portals, booking and ordering systems, and dashboards.
- Mobile apps for Android and Windows, with accounts, payments and store releases.
- Integrations that connect payments, CRMs, databases and the tools you already use.
- Game development in Unity, from card games to online multiplayer.
Our own game
The studio’s first product is Euchre Player’s Network, a free online euchre game with ranked tables, private games with friends, Pro bots and a moderated lobby, playable in the browser and on Android and Windows. We built it, run it in production and support it ourselves, and it’s the proof behind our client work. Read how it was built, or learn how to play euchre.
How we work
- A free written quote first, with scope, timeline and price agreed before any work starts.
- Working builds you can try every week or two, not a big reveal at the end.
- Automated tests before every release.
- You own the code, with documentation so any capable developer could pick it up.
- Here after launch for hosting, monitoring and updates.
Where we are
We’re in Geneva, Illinois, and happy to meet in person across St. Charles, Batavia, Aurora, Naperville and the rest of the Fox Valley. Most work happens remotely, so we also work with clients anywhere in the US.
Reach us at support@graystonedevelopmentstudios.com or 630.440.1615.
Start a project
Have a project in mind?
Tell us the services you need, your time frame and your budget. You’ll get a written quote with scope, timeline and price.
Geneva, IL 60134