Record and revisit your reading.
ReadCodex is a reading app for recording the books you read and the lines that stay with you, then reviewing them. Genial Studio is building it.
Not launched yetYour shelf
Add books by searching or scanning the barcode, and keep them sorted into four states.
While you read
Time your reading, and enter the page you reached to update your progress.
Keep notes and quotes with page numbers, and photograph a page to have the text recognized on your iPhone, ready to save.
Lines that come back
Saved words and sentences come back at spaced intervals, as multiple-choice, fill-in-the-blank, or typing cards.
AI that helps you understand
Ask the AI about the book you’re reading, and get help with passages and end-of-book summaries. Map how each book’s characters relate.
In the iOS app you can also bring your own API key (OpenRouter, OpenAI, Anthropic, or Google Gemini). The key is stored only in your device’s Keychain; it passes through our server only while a request is handled, and the server does not log it.
AI answers can be wrong, so we ask readers to check them against the book.
Reading together
In the reading room, see lines and thoughts others reading the same book chose to share, without names.
Reading clubs run discussions and meeting schedules.
Your year in reading
See reading time, finished books, and your genre mix in charts, and look back with a yearly reading report.
How your records are handled
Who can sign up?
Anyone 14 or older can sign up with a Google or Apple account. We don’t ask for your birth date.
Where are my records kept?
Our app server and database are in Google Cloud’s Seoul region. Some data needed for sign-in, notifications, subscriptions, and AI goes to US providers; the privacy policy lists who they are and what is sent.
Is there ad tracking?
We don’t collect advertising identifiers or track you for targeted ads.
What happens when I delete my account?
Deleting your account in the app erases your records and personal data on our server, except a few records listed in the privacy policy that we keep for a set period by law or to prevent abuse.
Launch status
- iOS
- In test builds. Not on the App Store yet.
- Android
- A native app in development.
- Web
- In the works, not yet public.
- Language
- Korean
- Pricing plan
- Core reading features will be free, and ReadCodex Pro is planned. Payments will go through App Store in-app purchase.
So far
- Development begins
- Rebuild begins as a native iOS app
- Native Android app begins
- Bring-your-own-key and the reading room added
- Age-14+ confirmation added; revised privacy policy takes effect