Nuruk Studio is an independent software studio based in South Korea. We make apps that stay with people in everyday life, and we share how we build them with AI.
Nuruk is the small starter that turns plain grain into something new.
In Korea, nuruk is the traditional fermentation starter behind makgeolli and other slow-made foods. It is easy to overlook, yet given time it transforms ordinary ingredients into something with depth.
That is the kind of software we want to make: quiet, not loud, but able to make ordinary moments a little more special each day, and better the longer you use it.
Mission and vision
Mission
To make small, honest software that people enjoy using every day. We care more about how a product feels in the hand than how many features it lists.
Vision
A world where a small team working alongside AI can build and run products that once needed an entire company. We want to prove it with our own work, and help many more people do the same.
What we believe
Small, honest, and built to last.
01
Small on purpose
Staying small lets us decide quickly and respond directly to the people who use our products.
02
Honest by default
Clear pricing, only the data we truly need, and no design tricks that work against the user.
03
Craft over volume
We would rather polish one thing well than ship many things half done. We test on real devices and keep refining.
04
AI as a teammate
AI helps us move faster, but people decide what to build and what good looks like.
What we do
App development
We create our own consumer apps end to end, from idea and design to development, launch and operation.
iOS and Android from a single codebase
Built for global users with multiple languages
Continuous updates long after launch
AI education
We are preparing hands-on courses that teach people to build real products with AI, based on how we actually work.
From idea to launch, step by step
Practical workflows with AI coding tools
For founders and solo makers, not only engineers
AI education program (in preparation)
We teach exactly how we work.
Hands-on rather than theoretical. The goal is for every learner to take their own idea all the way to a real launch.
01
Shape the idea
Define the problem and scope a first version with AI.
02
Build with AI
Build an app with Claude Code and learn to read and fix the code.
03
Quality and testing
Test on real devices and fix problems with evidence, not guesses.
04
Launch and run
Store review, payments, updates and everything after launch.
How we work
AI is part of every step.
We work with Claude as part of the team. It lets a few people build and run apps that would usually take many more.
01
Plan
We define the problem and shape the scope, reviewing ideas together with AI.
02
Build
We write, review and refactor code with Claude Code.
03
Test
We check everything on real devices before it ships.
04
Ship and listen
After launch, we listen to users and keep improving quickly.
Technology
Proven tools, and custom work where it matters.
We ship iOS and Android from one codebase, and write our own GPU shaders where quality matters most, such as photo processing. Every film effect in Tono runs in real time on the device.
Claude · Claude CodeReact Native · ExpoTypeScriptSkia GPU shadersSupabaseCloudflareRevenueCatSentry
Our apps
Two cameras for everyday moments.
Tono
Live on iOS and Android
A film camera and editor, entirely on your phone. One tap gives a finished film look with no complicated editing, ready to save or share.
Film filters grouped by mood, with adjustable strength
Six tone sliders: exposure, contrast, saturation, temperature, highlights, shadows
Analog finishes: grain, vignette, light leak, fade and date stamp
Save favorite settings as My Filters
No account needed, and every photo stays on the device
One-time purchase, no subscription
English · Korean · Japanese
Dayin
Coming soon on iOS and Android
A group film camera that gathers everyone's photos from a shared day into one album. While you shoot, nobody can see anyone else's photos. When time is up, everyone's shots are revealed at once.
Shared rolls for weddings, trips, birthdays and parties
Choose a length from 3 hours to 3 days, with limited shots per person
Everyone's photos revealed together when time is up
Friends without the app can join from a link in their browser
Reactions, comments and a short recap video of everyone's shots
Shared only within the group, with no public feed
Milestones
2026.07Nuruk Studio founded
2026.07Tono launched on the App Store
2026.08Tono launched on Google Play in English, Korean and Japanese
2026.09Dayin approved on the App Store, preparing for launch
NextDayin launch and our first AI education course
What's next
Launch Dayin on iOS and Android
Bring our apps to more countries
Our first AI education course
Contact
Let's talk.
Partnerships, education inquiries, press, or just to say hello.