GGAMI STUDIO is an independent software studio in Seoul, run by Jaewook Oh since 2026. We make apps and games for iPhone, Android, and Apps in Toss, the mini-app platform inside the Toss app.
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Each of our three apps in development uses Claude for one core job. None has launched yet, so this describes the plan.
Saju is Korean fortune-telling based on the year, month, day, and hour of a person's birth. Readings in apps often feel generic: the same stock paragraphs for everyone with a similar chart. Our app will send a person's chart to Claude, which writes a long reading about that chart and answers follow-up questions. The chart itself is calculated in code; Claude only interprets it. We use Opus 5.5 because a reading runs long, and later sections must not contradict earlier ones. Readings are for entertainment only.
Practicing for an interview alone gives you no feedback. In the app, you will answer a question by speaking or typing, and Claude will reply with short feedback on that answer and ask the next question. Spoken answers are turned into text before they reach Claude. Haiku 5.5 is fast enough for feedback to arrive within seconds on every turn, and we will stream it so the first words appear right away.
New parents have many small questions about feeding, sleep, and daily routines, often late at night. The assistant will answer them in plain language. Sonnet 5.5 fits the middle: these answers need more care than quick interview feedback, but a tired parent shouldn't wait as long as for a full saju reading. It will give general information, not medical advice. When a question sounds like a symptom or a medical concern, it will tell the parent to contact a doctor.
All three apps will share one backend. The app never calls Claude directly.
Mobile app
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GGAMI STUDIO backend
· holds the API key; the app never does
· one model per app (Opus/Haiku/Sonnet)
· per-user rate limits
· versioned prompts per app
· sends only the input Claude needs
↓
Claude API (Messages API)
↓
GGAMI STUDIO backend
· interview: streams feedback live
· saju, parenting: checks the answer
and adds the disclaimer
↓
Mobile app
Every app will tell you up front that you're talking to an AI.
We write, review, and test our code mainly with Claude Opus 5.5, alongside Fable 5.1.
Questions, feedback, or partnerships: hello@ggami.studio