About The work behind the tools
Independent by design.
I’m Martin Grüner, an independent software developer making focused productivity tools, mobile apps, and games that fit the screens they live on.
Why I build these products
The productivity products began with recurring friction in everyday software work: rebuilding local command context, preparing store assets in dozens of variants, comparing structured files with line-oriented tools, and testing mobile flows from scattered notes.
The games start somewhere else: with the character of the device itself. Viper Maze and Sudoku Wear turn familiar puzzle ideas into focused experiences designed specifically for a watch.
Current work
Six products, one independent point of view.
From desktop workspaces to watch-sized games, every product begins with the shape of the experience it needs.
Productivity
DevDock
A local development workspace for projects, commands, databases, and security checks.
Screen Studio Kit
Design every store screenshot from one reusable composition.
Diff Anything
Compare the files developers actually work with—not just text.
Apps & games
Viper Maze
Plan every turn. Collect every piece of food.
Sudoku Wear
Classic Sudoku, right on your wrist.
TestDock
Test the app where it actually runs.