Most "best vocabulary app" lists are written for students cramming for an exam. Small business owners have a different problem: the words you actually need are the ones in your own contracts, your own proposals and your own industry, and nobody has made a deck for freight forwarding or dental billing.

So this list is ranked by one question: how well does each app handle vocabulary nobody has already built a deck for?

Quick comparison

App Best for Free tier Handles niche jargon
Flashi Your own industry terms Yes, no account Yes, generates from your material
Anki Total control Free except iPhone Yes, if you build the cards
Quizlet General business English Limited Only if a deck already exists
Memrise Pronunciation and phrases Limited No
Vocabulary.com Depth on general English Yes No
Babbel Structured courses No No
WordUp Everyday English range Limited No

1. Flashi, free to download, and best for your own industry terminology

Flashi is free to download on iPhone with no account required, and the reason it ranks first for small business specifically is narrow but decisive: you paste in a contract clause, a supplier email or a list of terms, and it writes the flashcards. There is no pre-made deck for your niche and there never will be, so being able to generate one in seconds is the whole argument.

Spaced repetition is built in, so the app decides what you review and when rather than leaving that to you.

The free tier covers your first AI-generated deck, and Flashi Pro removes the generation limit.

Weakness: iPhone only, and there is no pre-made business English library to fall back on if you would rather not supply your own material.

Download Flashi free on iPhone

2. Anki, best if you want total control

Anki is the serious tool. Its scheduling algorithm is the benchmark everything else gets measured against, the card format is fully customisable, and your data stays yours.

The cost is setup. You build every card yourself, and card templates, deck options and add-ons all take time to learn. If your actual constraint is hours in the day, that is a real price.

Free on desktop and Android. AnkiMobile is $24.99 on iPhone, which catches people out.

Best for: you enjoy the tooling and will spend an afternoon on it.

3. Quizlet, best pre-made business English library

If you want general business English rather than your own trade's vocabulary, Quizlet's library is the largest here. Search "business English" and you get hundreds of community sets covering meetings, negotiation, finance and email etiquette.

Two caveats. Community sets vary in quality and nobody has checked them for accuracy. And the genuinely useful study modes increasingly sit behind Quizlet Plus, around $35.99 a year.

Best for: general professional English, when a good enough deck already exists.

4. Memrise, best for saying the words out loud

Memrise leans on short clips of native speakers using phrases in context, which makes it stronger than plain flashcards for pronunciation and for phrases you will actually say in a meeting.

Less useful for terminology you mainly read and write, like contract language, and the content is course-shaped rather than something you can point at your own documents.

Best for: spoken business English, particularly if English is not your first language.

5. Vocabulary.com, best for depth on general English

Genuinely excellent definitions and an adaptive system that adjusts to what you already know. If the goal is to write more precisely rather than to learn a trade's terms, this is the best-written option here.

It is general English though. It will not teach you your industry.

Best for: sharpening general professional writing.

6. Babbel, best if you want a course, not cards

Babbel is structured lessons, including business English tracks, rather than a flashcard tool. If the honest problem is that your English is intermediate and you want a curriculum, that beats drilling isolated words.

Subscription only, and it will not touch niche terminology.

Best for: non-native speakers who want structure.

7. WordUp, best for general everyday range

WordUp ranks words by how useful they actually are and shows them in real film and news clips. Good for widening general English.

Same limitation as the rest: not built for the vocabulary of one specific business.

Best for: broadening everyday English.

How to choose, in one question

Does a good pre-made deck already exist for what you need?

If yes, use Quizlet or Memrise and save yourself the work. General business English, meeting phrases and finance basics are all well covered.

If no, and for most trades the answer is no, you need something that builds the deck from your own material. That is Flashi, or Anki if you are willing to write the cards yourself.

Five categories worth learning first

Whichever app you pick, sequence matters more than volume:

  1. Contract and proposal language. The terms in documents you actually sign. Getting these wrong is expensive.
  2. Client-facing phrases. How you describe your service, pricing and timelines, consistently.
  3. Industry terminology. What your suppliers and competitors use. Fluency here reads as credibility.
  4. Financial vocabulary. Margin, accrual, net terms, reconciliation. The language of your own numbers.
  5. Negotiation language. Phrases for pushing back, conceding and closing without sounding unsure.

A routine that survives a working week

Ten minutes, once a day, at a fixed time. That is the whole method.

Spaced repetition handles the sequencing, so you never decide what to review. The failure mode is not doing too little each day, it is skipping days and then trying to catch up in one long session, which is precisely what the research says does not work.

Add words as you meet them. A term you had to look up during a client call is worth ten from a generic list, because you already have the context that makes it stick.


If your vocabulary problem is your own industry's language rather than general business English, the deciding factor is whether an app can turn your material into a deck without you writing the cards.

Download Flashi free on iPhone and generate your first deck from a document you already have.