# Acumo: English Usage — Words & phrases that trip you

> Words & phrases that trip you (iPhone/iPad app by LOKO TECHNOLOGIES LTD..)

- Source: https://appshunter.io/ios/app/acumo-english-usage/id6797753558 (this page in markdown: same URL + `.md`)
- Developer: [LOKO TECHNOLOGIES LTD.](https://appshunter.io/developer/6788583219)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 9+
- Requires: iOS 17.0 · 18 MB
- Languages: American English
- Released: 2026-10-06
- Data updated: 2026-10-29

## What is Acumo?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Acumo Pro | $14.99 | one-time |


## Is Acumo safe?

Not enough ratings yet to assess Acumo.

## Is Acumo legit?

Acumo: English Usage has limited verification signals. The AppsHunter Legitimacy Score for Acumo is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.1.1 — 2026-10-26

• A word spelt two ways, such as grey and gray, is never offered as a wrong answer in review, and comparing the two says they are one word.
• A link to a word that isn't in your version of Acumo now says so, with a way back, instead of an empty screen.
• New in the collection: councillor and anaemia, the British spellings, beside councilor and anemia.
• And other fixes.

### 1.1.0 — 2026-10-13

• All entries has an A–Z index along its edge: tap a letter, or slide along it, to go straight there. Requires iOS 26 or iPadOS 26 or later.
• Settings › Audio › Get a better voice shows which free voices to download, and where to find them.
• From the collection, on the Search screen, is now a hand-picked word, phrasal verb and idiom, a new three each day.
• And other fixes.

### 1.0.0 — 2026-10-08

No release notes.

## More apps by LOKO TECHNOLOGIES LTD.

- [True North: Citizenship Test](https://appshunter.io/ios/app/true-north-citizenship-test/id6792220358)

All apps by LOKO TECHNOLOGIES LTD.: https://appshunter.io/developer/6788583219

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-29.*