How it works Pricing Journal

Level up your Korean with

Lessons built from what you're learning.

TOPIK

Levels 1–6

10,000 vocab and 322 grammar points

KIIP

Levels 1–4

Follow your class, lesson by lesson

Or import your own content

Song lyrics, news, manhwa, class notes

Song lyrics

Now playing 한 단어씩1:12 / 3:05

하루에 한 단어씩너와 함께 배울게잊어버려도 괜찮아다시 돌아올 테니까

News articles

A news article: a fox who has lived in Korea for a year now orders kimbap in Korean

Manhwa

Class notes

KIIP 3단계 · 집 구하기

집을 구할 때

월세와 보증금을

확인해요.

Choose TOPIK, levels 1 to 6 with 10,000 vocab and 322 grammar points, or KIIP levels 1 to 4, or import your own content: song lyrics, a news article, a manhwa or a photo of your class notes. Flash Fluency pulls out the vocab and grammar, then teaches you the new ones in sentences at your level: here, 8 words and 3 grammar points.

Every sentence is +1.

Exactly one new concept in every sentence

+ One or two concepts due for review

그 식당이 또다시 문을 닫기로 했어요.

That restaurant decided to close again.

Every concept comes back right before you'd forget it.

So everything you learn becomes something you remember.

Following 또다시 (again)

또다시 Remembered

Study via our +1 SRS Integrated Learning Loop

Reading

Listening

Cloze

Translation

Pronunciation

ConversationComing soon

Exercises: reading, where you tap any word to see how it's built and tap again for the full lesson; listening with ElevenLabs audio; cloze, where you recall vocab and grammar in context and see which other words fit and how they differ; translation, where you build sentences with what you've just learned and get precise notes on errors, nuance and style; and pronunciation, with a curriculum that covers every pronunciation rule and feedback on every syllable you say. Conversation exercises are coming soon.

Reading

Tap any word to see how it's built
Tap again for the full vocab or grammar lesson

Listening

World-class ElevenLabs audio

Cloze

Recall vocab and grammar in context
See which other words fit, and how they differ

Translation

Build sentences with what you've just learned
Get precise feedback on errors, nuance and style

Your translation

Translate into Korean…또다시 우리는 이 식당에 가려고 했어요

Pronunciation

A curriculum that covers every pronunciation rule
Feedback on every syllable you say

Conversation exercisesComing soon

학교 → [학꾜]After a ㄱ sound, the next consonant gets stronger.

갔어요 → [가써요]The final ㅆ slides into the next syllable.

WrittenHow it sounds

학교꾜에갔가어써요ㅆ

You said

학꾜에카써요

You said 카. Make it 가: softer, without the burst of air.

Start for free.

Three free exercises a day on iOS and Android.

Download on the App Store Get it on Google Play

1 of 7 Open

Start free. Upgrade when you're ready.

LAUNCH PRICING

Free

·3 core exercises a day (10 to 15 minutes)
◦reading, listening, pronunciation, and fill-in-the-blank

Core

$6 /mo

·Unlimited core exercises
·10 translation exercises a month
·Vocabulary topics
·Content-to-Curriculum: 30 words or grammar points from your own content a month

Premium

$13 /mo

·Everything in Core
·100 translation exercises a month
·Content-to-Curriculum: 300 words or grammar points from your own content a month
·Ask Flash

1 week free trial · $10 and $20 after launch

Built in Seoul, by a Korean learner.

Carl

Founder · Seoul

K-Startup Grand Challenge 2026 Participant

Korea's government-backed accelerator for international startups

Hi, I'm Carl. I tried a lot of apps and online tools and still wasn't quite happy with how my Korean was progressing. So in April 2024 I started building the app I wish I'd had on day one. Every grammar lesson. Every pronunciation rule. Learn about any topic you want through our Content-to-Curriculum system. Pronunciation feedback down to the individual sound. Conversational shadowing and free-form exercises. Hangul to C1. All in one place.

Not all of it's built yet, but a lot of it is! I expect the remaining features to be out before 2027.

Want to be part of the build out? Join our Discord!

Join the Discord

Flash Fluency Co., Ltd. · Seoul, Korea