Vocabulary infrastructure for advanced learners
Stop guessing your English level. Map it, grow it, prove it.
An adaptive check-in finds your cliff in the top 10K words. Practice nuggets, free essays, and an AI coach feed a live heatmap of every lemma and chunk you actually know. Tech and pharma scenarios shipped, more verticals on the way.
Domains
2 live · 0 building · 7 on waitlist
Tech
Engineering · PM · Design · AI/ML · Data
Pharma & Healthcare
Counter pharmacy · Hospital · Lab
Hospitality
Hotels · Cruises · Restaurants
Legal
Paralegal · Immigration · Family
Aviation
Cabin crew · Ground · ATC
Construction & Trades
On-site · Materials · Safety
Customer Service & Call Centers
BPO · Support · Sales
Trucking & Logistics
DOT English · Dispatch · Cross-border
Beauty & Wellness
Salon · Spa · Esthetics
Don't see your field? Tell us what you need
What's inside
Six tools that talk to each other.
Check-in
Adaptive cliff detection
8 to 25 items, bayesian posterior over 10 frequency bands. Stops as soon as your cliff is clear.
Lexicon
GitHub-style heatmap
500 cells across the top 10K words. Click any cluster to see the lemmas inside and rate them.
Practice
Retrieval-first nuggets
Type your instinct before seeing a native phrasing. SRS schedules cards by your honest self-rating.
AI coach
Calibration without slop
gpt-5-mini compares your instinct to the native answer in your L1, with one concrete nudge per card.
Expressions
Chunks, idioms, hedges
Every typed answer mines multi-word expressions. Inline underline shows them in context with audio.
Essay
Write or speak honestly
100 to 400 words by typing or voice. CEFR distribution, 5 strengths, 5 gaps with concrete rewrites.
How it works
3 steps · ~15 min/day
01
Map your cliff
A 5-minute adaptive check-in puts your level on a 10-band frequency scale. No guessing.
02
Practice in scenarios
22 nuggets across tech and pharma personas. Type or speak your answer. AI coach calibrates.
03
Watch the heatmap fill
Every typed answer feeds a live map of lemmas and chunks. Your real progress, no XP slop.