Readle (formerly Langster) is a CEFR‑levelled language learning app that turns real‑world news articles and stories into short, structured lessons. Each story provides reading text, sentence‑by‑sentence audio, integrated grammar tips, flashcard‑style vocabulary with spaced‑repetition, and an in‑app dictionary lookup. The app organizes content by proficiency levels from A1 to C1 (and equivalent JLPT/HSK levels), allowing users to study for just a few minutes each day. Its distinctive approach combines immersion through authentic stories with structured lessons and adaptive review.