arcoco is an English vocabulary game for iPhone and Android, made by Arcoco Ltd, a company registered in England and Wales. You practise choosing precise words through short games such as River Runner, Pressure Test, picture stories and sentence gaps, and words come back for review.

Adults and teenagers aged 13 and over who already understand English, whether native speakers or confident learners, and want more words to choose from. It is not a beginner English course, a pronunciation coach or exam preparation.

You can start free on both platforms. On iPhone you get free games every day, and optional arcoco Plus adds unlimited games. The first Android release is free with no purchases. The How arcoco works page lists the current details.

Do I need an account to play?

No. You can play without signing in. On iPhone, Apple or Google sign-in is optional if you want to save and restore your progress.

Does arcoco have ads?

No. arcoco has no ads on iPhone or Android.

English vocabulary games · iPhone & Android

Find the words for what you mean.

Already comfortable in English, but reaching for the same words? arcoco turns word choice into quick games. Row through word gates, rescue matching words from piranhas and pick the word that fits a story.

Download for iPhoneApp Store Download for AndroidGoogle Play

Start free
No sign-in needed
No ads

Try it here

Which word fits best?

Five quick rounds, the way arcoco asks them. Pick a word, see why it fits, and share your score.

She checked the position of every tiny window on the model before showing it to anyone. She is ____.

careful
meticulous
busy

Check the answer

Meticulous. Careful fits too, but meticulous says more: attention to every small detail. Busy tells you nothing about how she worked.

Nothing is booked yet, so Friday is only a ____ date for the trip.

candid
tentative
concise

Check the answer

Tentative. It means suggested but not yet settled. Candid describes honesty, and concise describes saying something in few words.

I asked for honest feedback, and Sam was ____: the opening was too long and the ending felt rushed.

cordial
vague
candid

Check the answer

Candid. It means open and honest, even about something awkward. Cordial means friendly and polite, and vague means unclear, the opposite of Sam’s answer.

Amira cooks at home and buys second-hand to save for a trip. She is ____, not mean.

frugal
stingy
lavish

Check the answer

Frugal. It describes sensible care with money. Stingy is critical, suggesting someone unwilling to spend or give. Lavish points the other way: spending a lot.

The answer took ten minutes and three detours. Next time, try to be more ____.

verbose
succinct
elaborate

Check the answer

Succinct. It means expressed clearly in few words. Verbose and elaborate both lean towards more words or more detail.

These sentences were written for this page. Want more? Try five vocabulary games you can play on paper or browse words people mix up.

Inside the app

Games that make you choose.

Every format asks the same question in a different way: which word fits here, and why?

River RunnerSteer your boat through the gate with the matching word.

Picture storiesRead a short story beside a picture, then pick the word that fits it best.

Pressure TestCatch the words that match before the piranhas get them.

A sentence gap: choose the word that completes a sentence about pineapple on pizza. — **Sentence gaps**Choose the word that completes a sentence.

The Word Journal, showing words collected and how each one is progressing. — **Word Journal**Words come back for review, and your Journal shows how each one is going.

Captured on iPhone. The appearance and available formats can vary by version and progress.

Words in context

Explore meanings, pictures and sentence gaps. Think about why one word fits better than another.

Different ways to play

Catch matches in Pressure Test, steer through word gates in River Runner and solve picture stories.

Practice you can revisit

Words return for review, and your Journal keeps track of how each one is going.

Quick answers

arcoco in a minute.

The short version, if you are deciding whether to try it. Full details, including what is different on iPhone and Android, are on How arcoco works.

What is arcoco?: arcoco is an English vocabulary game for iPhone and Android, made by Arcoco Ltd, a company registered in England and Wales. You practise choosing precise words through short games such as River Runner, Pressure Test, picture stories and sentence gaps, and words come back for review.
Who is arcoco for?: Adults and teenagers aged 13 and over who already understand English, whether native speakers or confident learners, and want more words to choose from. It is not a beginner English course, a pronunciation coach or exam preparation.
Is arcoco free?: You can start free on both platforms. On iPhone you get free games every day, and optional arcoco Plus adds unlimited games. The first Android release is free with no purchases. See the current details.
Do I need an account to play?: No. You can play without signing in. On iPhone, Apple or Google sign-in is optional if you want to save and restore your progress.
Does arcoco have ads?: No. arcoco has no ads on iPhone or Android.