拾词 Lexa - 背单词VOA & AWL words, offline
About
Lexa is a fully-offline English vocabulary trainer built on authoritative source materials, with a spaced-repetition engine that plans your reviews for you.
【Authoritative Word Books · 7,091 Words】
- VOA Core Vocabulary (1,533 words): from the official VOA Learning English Word Book, a US government work in the public domain
- Academic Word List (570 word families): Averil Coxhead's AWL, the standard for academic English reading
- CET-4 (1,809) and CET-6 (1,672) core words, plus a 307-word postgraduate exam set
- TOEFL/IELTS advanced vocabulary (1,200 words) selected by corpus frequency
- Exam Collection: one tap aggregates the exam books into a single deck
【Scientific Memory】 A Leitner box scheduler moves words to longer intervals when you know them and re-queues mistakes within the same session. Review gaps stretch from 10 minutes to 32 days; you just show up daily.
【Core Features】
- Flashcard study: flip a card for phonetics, definitions, word forms and bilingual example sentences (tap to hear them spoken)
- Answer with Know / Don't Know buttons or swipe gestures; wrong words come back before you finish
- Favorites: star difficult words and drill them in a dedicated session
- Pronunciation through the system voice, with optional auto-speak on every new card
- Word bank browsing and search across all books
- Daily goal, streak tracking and a 12-week study calendar
WHAT MAKES LEXA DIFFERENT
- Authoritative by construction: the VOA Word Book (public domain), the Academic Word List and ECDICT dictionary data (MIT), with sources and licenses disclosed in-app
- Context with every word: curated example sentences with Chinese translations and inflected-form highlighting, not just definitions
- Private by default: no account, no ads, no tracking, no network. Your progress never leaves your device.
PRICING
Everything ships with the app: all six word books, the exam collection and every feature are included, with no in-app purchases, no subscription and no ads.
FEEDBACK
Built by an independent developer. Questions, bug reports or feature requests are welcome at obeliskclubclub@gmail.com.
Terms of Service (EULA): https://obelisk.club/lexa/terms
Core Capabilities
Six authoritative word books, 7,091 words fully offline: VOA, AWL, CET-4/6, postgraduate and TOEFL/IELTS
Flashcards with phonetics, bilingual definitions, word forms and tap-to-speak example sentences
Leitner spaced repetition: known words move to longer intervals, mistakes re-queue on the spot
Know / Don't Know buttons or swipe gestures, with a favorites deck for hard words
Daily goals, streak tracking and a 12-week study calendar
Completely offline and private: no account, no ads, no tracking, no in-app purchases
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