Out now
Turquoise
AI calorie & fitness
One photo becomes a full log: calories, protein, carbs and fat. The coach reads your meals, workouts and goals before it answers, and the 3D exercise library takes requests for moves it does not have yet.
Independent apps & games · Wrocław, Poland
Apps and games,
built one at a time.
Stonefold Studio is Doğancan Yücel's studio in Wrocław. One person designs it, writes it, ships it and answers for it. Turquoise is out now on iPhone, Apple Watch, Android and Wear OS. Cairn is close to release. Gatherfall is in development in Unreal Engine 5.
Turquoise is live on the App Store and Google Play today.
- 1
- app out now
- 4
- platforms it runs on
- 106
- languages it speaks
- 5
- YouTube channels
Work
Three things, in order of readiness.
Close to release
Cairn
Skill tree
Learn any skill as a path of steps. A coach writes the lessons, spaced review keeps them in memory, and your own books sit beside them.
In development
Gatherfall
Open-world survival
A serious-toned, open-world zombie survival game you can play with friends — a shelter, runs out into the world, and an outbreak that keeps moving. Built in Unreal Engine 5, Windows first.
Channels
Five channels, all made in-house.
Written, recorded, animated and edited by one person — then the titles and descriptions are translated so the videos reach people who do not speak English.
-
Stonefold Studio
@stonefoldstudio
The studio's own channel: games, and how they get made.
Watch -
Gatherfall
@gatherfall
The devlog of the studio's first game, from an empty project onwards.
Watch -
Dogan Can Yucel
@dogancanyucel
AI tools, coding and tech, for people getting into software.
Watch -
Dogan Can Yucel History
@dogancanyucelhistory
History from the Big Bang onwards, animated shot by shot.
Watch -
Noodlewhy
@noodlewhy
An animated comedy series with its own characters, no dialogue needed.
Watch
Studio
One person, the whole way through.
Doğancan Yücel founded the studio in Wrocław in July 2026 and builds everything in it himself: the design, the code, the store reviews, the launch videos and the support mail. He is reading Computer Science at Uniwersytet WSB Merito Wrocław.
The studio is named for what the first two apps have in common. Turquoise is a stone; a cairn is a pile of stones that shows the way. Stonefold is the fold where they meet.
Elsewhere
Where else to find the studio.
Contact
Say hello.
dcy@dogancanyucel.com- App support
- support@dogancanyucel.com
- Press & partnerships
- dcy@dogancanyucel.com
- Where
- Wrocław, Poland