ChislOKay | By Fishydino

THE CHISLOKAY STORY

Why we built
ChislOKay.

“일, 이, 삼... wait, why is time 하나, 둘, 셋?”
For learners, Korean numbers are often the biggest roadblock. Two distinct numeral systems (Sino-Korean and Native Korean) take more than just reading textbooks to truly grasp.

We bypassed pure theory for intuitive practice and seamless repetition. What started as a niche project has evolved into the ultimate solution for Korean language enthusiasts worldwide—now fully available in English.

ЧислО + ОКей =ЧислОКей

‘Chislo’ (Number) + ‘OK’. Because numbers should just be... OK.

CAPABILITIES

The number practice you've been waiting for.

Beyond just reading. Immersive audio and precision-timed exams.

Languages. Zero compromises.

Your native language doesn't matter. Featuring a native Korean interface, with English and Russian available right out of the box. Effortless setup.

1 to 999 Trillion.

Generate numbers all the way up to 999,999,999,999,999. From everyday counts to macroeconomic figures from the news, all in one seamless experience.

Precision Listening Mode.

Reading and hearing are distinct skills. Listen to flawless TTS and respond. Pacing: 🐢 Slow / ▶️ Normal / 🐇 Fast.

Real-world Time.

“2:30” — hours in Native Korean, minutes in Sino-Korean. We isolated the trickiest patterns into a dedicated, focused mode.

Number Comparison.

Listen to two numbers and instantly decide which is greater (or lesser). It’s how Korean numbers become second nature.

Laser-focused Exams.

We strip away the UI to leave only the challenge. Set a timer (e.g., 30 minutes). Review bookmarks and dive deep into mistake analysis afterward.

POWERFUL DASHBOARD

Curate your practice.

Any skill level. One-tap configurations.

SINO-KOREAN MODE

45,920

Bookmark this Missed: 2 (Review mode ready)

All features. At a glance.

Settings

Language: 한국어, English, РусскийTheme: ☀️ Light · 🌙 Dark · 🔲 High ContrastQuick Presets: 🌱 Beginner · 🌿 Intermediate · 🌳 Advanced · 🎎 Native · 🎧 Audio · 🔄 Reverse ModeSave Custom Presets

Range & Number Systems

1 to 999,999,999,999,999Formats: 1 → 일, 10,000 → 일만Sino-Korean (일, 이, 삼...)Native Korean (하나, 둘, 셋...)

Modes

123 → 한글 (Writing, Default)한글 → 123 (Reading to Digits)🔊 Audio Guessing🕒 Time Telling👂 Compare Two Numbers (Greater/Lesser)

Tools

Daily Goals (Tasks per day)Voice Speed: 🐢 Slow · ▶️ Normal · 🐇 Fast⭐ Bookmarks (Save tasks)📝 Mistakes (Review only incorrect answers)

Exam

Minimal interface, maximum focus. Set a timer, start the practice, and get your own mock test.

Numbers. Now perfectly OK.

No logins. No paywalls. Just open your browser and start mastering numbers right now.

Get Started

* ChislOKay is an open-source, non-profit project by Fishydino, crafted to support Korean language learners worldwide.

Crafted by Fishydino with ❤️

Why we builtChislOKay.