Features

The four skills

45+ structured lessons A1→B2, each with theory (Markdown), warm-up prompts, curated YouTube videos, and auto-checked exercises (fill / choose / translate / fix / order / match / freeform), most with hints.
Wrong answer? One tap logs it to your error journal or you can override ("I was right").
Reference section ("Правила"): an all-12-tenses cheat-sheet plus grammar cards grouped by theme; Exceptions (irregular verbs, plurals, comparatives); Everyday words (days, months, numbers, colours); Body parts diagram.

50+ graded stories & classic fairy tales (A1–B1), each a full retelling (not a stub), illustrated with original art.
Tap any word → context-aware translation + save to your SRS deck.
Audio narration of the whole text, show-translation toggle, glossary you can add to the deck, and comprehension questions.
Picture books — a dedicated page-by-page reader you swipe through, with per-page audio and tap-to-translate.

Dictation drills A1–B1: press play, hear a phrase (ElevenLabs), type what you heard. Answers are forgiving (punctuation/contractions).

Answer free prompts or IELTS tasks (Writing Task 1/2, Speaking Part 1/2/3) by typing or speaking (Web Speech API where supported).
AI feedback calibrated to the learner's level: 3–6 most-important fixes explained in Russian, a corrected version, strengths, and an approximate band — automating the "handwrite → screenshot → tutor grades" loop.

Minimal-pair training (ship/sheep, think/sink, light/right…) — browse & compare, then an ear-training quiz.

🗓️ Daily session — one tap composes warm-up → due words → next lesson → listening/reading from your live data.
🧠 Spaced repetition (SM-2) — 3000+ words across 49 themed sets, plus any word you save from a text or the translator.
🗺️ Study plan A1→IELTS — phase roadmap, % done, weekly pacing ("on track / behind"), 🔥 streak, words-in-deck.
Gamification — XP, 10 levels, streaks (current + record), 10 badges.
Translator — context-aware (LLM) with fallback to LibreTranslate / MyMemory.
Push reminders — daily nudge that escalates to a "you've been away N days" re-engagement message.
Admin panel — manage learners, reset passwords, and see per-user stats (lessons done, streak, accuracy, XP).

ElevenLabs TTS — natural, measured pace; server-side disk cache so each unique phrase is generated (and billed) only once; concurrent requests coalesced.
WebP artwork, lazy-loaded; skeleton loaders and page fade-ins (no layout jank); tap-to-pause audio with a radial progress ring.
Installable PWA, offline-friendly, eternal login that survives deploys.