Genial Studio 지니얼 스튜디오
Card 001Software studio · Seoul
Location
Seoul, KR
Founded
Web
genialstudio.org

Genial Studio

A software studio in Seoul building ReadCodex, a reading companion app now in development, with Claude Code.

Product
ReadCodexIn development, not yet released
Platforms
iOS, Android and webNative SwiftUI and Jetpack Compose
Built with
Claude Code, since February 2026About 1,200 commits, nearly all co-authored with Claude
Registered
No. 659-15-02463Business registration, Republic of Korea
Card 002Product
Type
Reading app
Status
In development

ReadCodex

A reading companion app: keep your books, track your reading, and learn from what you read.

StatusIn development — not yet released. Coming soon to iOS and Android.

  • iOS · SwiftUI
  • Android · Jetpack Compose
  • Web app
  1. Library. Add and organize books with tags.
  2. Progress. Track reading progress and reading sessions.
  3. Focus mode. Read with ambient sound.
  4. Stats. See your reading statistics.
  5. Vocabulary. Learn words and sentences from what you read.
  6. Ask AI. Ask questions about the book you are reading.
  7. Clubs. Reading clubs and community with shared reading materials.
  8. Recommendations. Suggestions for what to read next.

Bring your own AI key

Readers connect their own AI provider key and can see their AI usage in the app.

  • Anthropic Claude
  • OpenAI
  • Google Gemini
Card 003Method
Tool
Claude Code
Since
February 2026

Built with Claude Code

ReadCodex has been built with Claude Code since February 2026.

How we build
Nearly all commits are co-authored with Claude, across the five codebases below.
In the product
Readers can connect their own Anthropic Claude key — or an OpenAI or Google Gemini key — to ask questions about the book they are reading.
commits
~1,200
codebases
5
first commit
Feb 2026

Five codebases

  1. 01Native appiOS (SwiftUI) and Android (Jetpack Compose)
  2. 02Web app
  3. 03Admin console
  4. 04Earlier prototypeFlutter
  5. 05Earlier prototypeReact Native

From cross-platform to native

  1. PrototypeFlutter
  2. PrototypeReact Native
  3. NowNative SwiftUI on iOS, native Jetpack Compose on Android

We moved to a native SwiftUI iOS app to follow Apple’s Human Interface Guidelines, with a native Android app alongside.

Card 004Company
Country
Republic of Korea
Est.
2025

Company

Registered name (상호)
지니얼 스튜디오
English name
Genial Studio
Business registration no.
659-15-02463 사업자등록번호 · registered in the Republic of Korea
Founded
Address
26, Hangang-daero 104da-gil, Yongsan-gu, Seoul, Republic of Korea 서울특별시 용산구 한강대로104다길 26 (동자동)
Card 005Contact
By
Email

Contact

For anything about Genial Studio or ReadCodex, write to

contact@genialstudio.org