From enterprise to indie.
A side project since 2011, full-time since 2025.
Thomas Feucht
Founder & Developer
The Story
One developer, many products.
Thomas Feucht founded Crimson Dragon in 2011 while working as an Enterprise Architect at Mercedes-Benz. It started as a way to publish small mobile apps in his spare time, Piano For Kids among them.
In 2025 he left Mercedes-Benz to work on Crimson Dragon full-time. He is remaking the 1989 game Oil Imperium as Oil & Soil and building rytica, an AI tool for mindmapping. Two small iPhone apps are live in the App Store: GKV Alarm, which warns you when your German health insurer raises its contribution, and Bitcoin Island, which puts the Bitcoin price into the Dynamic Island.
Crimson Dragon is a one-person studio. Contributors, testers and people from our Discord community help with development and testing.
What drives us
Our Values
Players and users first
We build for the people who use our products, and their feedback decides what we work on next.
Ship early
We release early versions, listen to feedback and improve from there. rytica's Early Access is one example.
Made in Stuttgart
We design and build everything here, with the habits of someone who spent years building enterprise software.
Curiosity
A piano app for kids, a tycoon game and AI tools have little in common, except that we wanted them to exist.
Retired products
Burned by the Dragon
Not every idea survives. These products have been discontinued and rest here.
Change Happens
Change Happens watched websites for you: you told it what mattered, and its AI agents checked the pages and let you know when something relevant changed.
Swing Birdking
The birdking got a present from his inventor: he could fly without his wings. You tapped to steer him past the obstacles and climb as high as you could.
Soap Bubble Bingo
A dice board game: two dice, 25 rolls per round, and you placed each sum into a 5×5 grid to complete rows, columns and diagonals. Played solo against the Game Center leaderboards or face-to-face with two players on the iPad.