The Missing Workbook
For those who want the best command of English. We cover what standard English education left off.
A1 free forever · A2–C2 with Pro · no card to start
/juːˈbɪk.wɪ.təs/
present, appearing, or found everywhere
The method
Modern spaced repetition
We use a mix of FSRS-5 and SM-2 spaced-repetition algorithms to imprint three things into your brain — and keep them there.
Why you should care
Linguistic sophistication is undervalued — and it is a force multiplier. Look at almost anyone at the top of their field, and you'll find someone who uses the language with remarkable sophistication and nuance.
The destination
Sir James Murray
This app is for those who want to get closer to the level of Sir James Murray — the self-taught editor of the Oxford English Dictionary, portrayed in The Professor and the Madman. Command of English at that depth is a lifetime's craft. Consider this your workbook for it.
The Professor and the Madman on IMDbGood feedback earns free Pro
Tap the letter button anywhere in the app to send feedback. We read all of them, and our AI agents ship improvements from them. If yours makes the product genuinely better, we give you Pro for free. Leave your email so we can reach you; anonymous is fine too.
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Start filling the gaps
Begin with the dictionary, or make an account and let the words stick.