# LevelDoo features — easy English news at your level

## Reading
- Five CEFR levels per article (A1→C1), same facts at every level — graded news you can actually read
- Interactive level dial — drag to watch the same story rewrite itself
- Tap-any-word dictionary: instant level-aware gloss + Chinese translation + one-tap save
- Karaoke listening: browser TTS highlights each word as it speaks, slower at lower levels
- Per-article key vocabulary, curated per level

## Memory
- Saved words become SM-2 spaced-repetition flashcards with the original sentence as context
- Review queue shows only what's due today (Again / Hard / Good / Easy)
- Deck page with per-word status, mastery stage, forgetting curve and source article

## Motivation
- Daily streak + XP, streak freezes, 28+ milestone celebrations up to 3650 days
- Gentle goal (1–5 articles/day, your choice) plus weekly goal
- Year-round activity heatmap + monthly calendar
- Estimated level badge + weekly re-estimate, XP ladder to the next CEFR level
- Interest topics shape tomorrow's pack; pick today's story from three choices

## Platform
- PWA: installable on iOS/Android/desktop, offline reading of cached packs
- Local-first: everything works without an account; Google sign-in syncs across devices
- Dark mode, EN/中文 UI

## Pro (planned)
- Say-it-back: summarize the story aloud, get AI feedback (credit-based)
- Unlimited everything + offline packs + weekly report

See also: [method.md](/docs/method.md) · [pricing.md](/docs/pricing.md) · [LevelDoo](https://leveldoo.com)