§ The Journal

Inside Flash Fluency.

Notes from building a Korean learning app: how we use comprehensible input and spaced repetition, why real pronunciation feedback matters, and reference material like our hangul cheat sheet. New posts as we ship.

2026-08-09

Learn Korean from Content You Actually Care About

Drop in song lyrics, a news article, or your class notes. Flash Fluency extracts the Korean vocab and grammar and turns them into lessons at your level.

2026-06-30

Hangul Cheat Sheet: Korean Alphabet Chart (Free)

The full Korean alphabet on one page: all 40 hangul letters, consonant and vowel charts, double consonants, and batchim endings, with pronunciation tips. Free, printable.

2026-05-06

Real Korean Pronunciation Feedback, Down to the Syllable

Korean pronunciation feedback that pinpoints the exact syllable and sound you missed, plus a curriculum that introduces and tests every sound change rule.

2025-04-09

+1 SRS: Comprehensible Input Meets Spaced Repetition

Every +1 sentence introduces exactly one new Korean word or grammar point, based on what you already know. Spaced repetition brings it back before you forget.