Acumo: English Usage

Acumo is for advanced learners of English, B2 to C2, who know most of the words and keep mixing up a few. Adverse and averse. Imply and infer. Discreet and discrete. Most vocabulary apps teach you more words; Acumo teaches the difference between the words you already know. WHAT YOU WILL CONFUSE IT WITH, AND WHY Open any word and a strip beneath it shows the words you are most likely to mix it up with, each labelled with the reason they collide: the same sound, a near sound, a look-alike spelling, a swapped prefix, a usage trap, or a phrasal-verb family. Tap one and the two sit side by side, with the line that separates them. More than 4,500 confusable pairs, and all of it is free. EVERYTHING ON ONE SCREEN Pronunciation in IPA with audio, part of speech, register, a plain-English meaning, an example sentence, collocations, and a usage note where one helps. More than 8,500 words and phrases, from single words to phrasal verbs, idioms and sentence frames: original, written for Acumo, and shipped inside the app. A SHORT GLOSS IN YOUR LANGUAGE One line beside the English, in Persian, Spanish, Portuguese (Brazil) or Arabic. One pack is free, whichever you choose first. SAVE, THEN DRILL Save what you want to keep and review it with four kinds of card: recognition, cloze, production, and a discrimination card that puts two confusable words in front of you and asks which one the sentence needs. Drill a single pair straight from its comparison. A word that is not in the collection yet goes on your list in one tap, and the share sheet saves words from Safari and other apps. QUIET BY DESIGN No streaks, no XP, no mascot. One daily reminder, if you want it. Works entirely offline. No ads, no account, and no data collected. ACUMO PRO One purchase, never a subscription. Pro adds the retention system: • FSRS scheduling: each word comes back on the day you are about to forget it. That timing is the FSRS algorithm, as used by Anki. • Weak-item targeting: drills what you keep getting wrong, not what you already know. • Progress: your retention rate and the pairs you keep mixing up. • Widgets: the word of the day and your due count on the Home Screen and Lock Screen, gradeable without opening the app. • Anki-compatible export: take your list with you whenever you like. • Backup and restore: your list, and where each item sits in the schedule, onto a new device. • Every gloss language beyond your first.