KOREAN · iOS & ANDROID

Select. Study. Speak.

Pick anything you want to learn Korean from. We turn it into lessons at your level, then coach you through actually saying it.

1SELECTwhat you want to learn

Drop in anything you want to learn.

An article, a song, your class notes. Whatever you drop in becomes your lessons. Or start with the core curriculum: complete beginner to advanced, plus 100+ topic packs.

Content-to-CurriculumCore curriculum100+ topic packs

5,000 core vocabulary · 320 grammar points

Custom lists built from your own content

2STUDYevery word, all the way down

Study it four ways.

Study every vocab word and grammar point through +1 SRS sentences pitched just above your level. Two exercises to prove you understand it, two to make you produce it.

+1Every sentence introduces at most one new concept, so you're always learning and never overwhelmed.

SRSEvery concept comes back at the optimal interval, so what you learn stays learned.

COMPREHEND

ReadingListening

→

PRODUCE

Fill in the blankTranslation

320 grammar lessons · a vocab lesson for every word you meet · one tap away

3SPEAKconfidently

Speak as well as you read.

Every pronunciation attempt is analyzed sound-by-sound so you know exactly what you're saying correctly and what sounds need work.

YOU SAID한국말

FLASH한국말 is pronounced 한궁말.The ㄱ in 국 turns into ㅇ before the ㅁ. That's nasalization, one of the rules we drill until it's automatic.

Guided ConversationsDEC 2026

Order coffee, ask for directions, make plans. Shadow it, then do it yourself.

Open ConversationsDEC 2026

Discuss the news article you uploaded last week, in Korean.

Every Korean pronunciation rule

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

Ready when you are.

Free to start. No card. iOS and Android.