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Clozemaster
What Clozemaster is
Clozemaster helps learners build vocabulary by completing fill-in-the-blank sentences. Each prompt puts a missing word in context, and learners can answer by selecting from multiple choices or typing the word. Sentences return for review, with progress tracked by word frequency. Clozemaster offers 75 languages; its homepage describes thousands of sentences across more than 50 languages and over 170 language pairings. The service is available on the web, Android, and iOS, and includes personalized review and offline lessons. Some sentences show ChatGPT explanations by default, while others can be explained when a learner selects Explain. Sentence and translation content comes from Tatoeba, a user-curated dataset released under a CC-BY license; Clozemaster notes that entries can contain errors and can be reported in the game. The Free plan costs nothing and allows 30 sentences per day. Pro plans add unlimited sentence practice, listening practice, custom settings, advanced statistics, and offline mobile play. Listening practice is available for over 30 languages and is limited to Fast Track, Most Common Words, and Grammar Challenge collections. Pro teachers can create and share collections of up to 50 sentences without student accounts and view answer results.
Who it suits
Clozemaster suits learners who want to practice vocabulary through sentences, review words over time, and use web or mobile apps. Pro may suit learners seeking unlimited practice or teachers who want to share sentence collections and see student answers.
What it does well
- Practice vocabulary in sentence context with multiple-choice or typed answers.
- Review sentences over time and track progress by word frequency.
- Offers 75 languages across web, Android, and iOS.
- Pro includes offline mobile play and customizable review settings.
- Pro teachers can share collections of up to 50 sentences without student accounts.
What to know first
- The Free plan is limited to 30 sentences per day.
- Listening practice covers specified collections and over 30 languages.
- The FAQ notes user-curated sentences and translations may contain errors.
Limits
The Free plan allows 30 sentences per day. Pro listening practice is available for over 30 languages and only for Fast Track, Most Common Words, and Grammar Challenge collections.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | 30 sentences per day · web and mobile play | Free |
| Pro Yearly | recurring billing; 30-day money-back guarantee · unlimited sentences · advanced statistics · sentence search and favorites · custom review settings · listening practice · offline mobile play | $60 a year |
| Pro Monthly | recurring billing; cancel anytime · unlimited sentences · advanced statistics · sentence search and favorites · custom review settings · listening practice · offline mobile play | $8 a month |
| Clozemaster Pro Yearly | Recurring billing; cancel anytime · Unlimited sentence practice · advanced statistics · listening practice for supported languages and collections · 30-day money-back guarantee | On request |
| Clozemaster Pro Monthly | Recurring billing; cancel anytime · Unlimited sentence practice · advanced statistics · listening practice for supported languages and collections | On request |
As clozemaster.com lists them, read 15 Oct 2026. The maker's own page has the final word.
Getting started
- Open the Clozemaster website.
- Choose the Free plan for 30 sentences per day.
- Use Clozemaster on the web, or access it through the Android or iOS app.
- Choose multiple choice or type the missing word to answer sentence prompts.
Verdict
Choose Clozemaster for sentence-based vocabulary practice with review across web and mobile, including a free plan capped at 30 sentences per day. Pro is the fit for unlimited sentence practice, advanced statistics, custom settings, and supported listening; teachers can also share collections and view answers. Learners who need listening beyond the supported languages and collections should look elsewhere.
Questions
Is Clozemaster free?
Yes. Its Free plan costs nothing and allows 30 sentences per day.
Which platforms does Clozemaster support?
Clozemaster is available on the web, Android, and iOS. Offline lessons are available.
What languages and practice methods does it offer?
Clozemaster offers 75 languages. Learners complete fill-in-the-blank sentences using multiple choice or typed answers.
What does Pro include?
Pro includes unlimited sentence practice, listening practice, custom settings, advanced statistics, and offline mobile play. Listening is limited to supported languages and specified collections.
Can teachers use Clozemaster with students?
Pro teachers can create collections of up to 50 sentences, share them without requiring student accounts, and view answer results.
Where do the sentences and translations come from?
They come from Tatoeba’s user-curated dataset, released under a CC-BY license. Clozemaster notes that content may contain errors that users can report in the game.
Facts from Clozemaster's own pages
- AI explanations
- Grammar and contextual explanations are supplied by stored or on-demand ChatGPT-generated responses that users can report for correction. · api.clozemaster.com, 15 Oct 2026
- API availability
- A community developer documents internal REST endpoints under /api/v1/lp/ and requires browser cookies and a CSRF token, indicating no unauthenticated public API. · github.com, 15 Oct 2026
- API documentation request
- A 2025 forum post asks for an OpenAPI specification for third-party clients, showing that official public API documentation was not readily available there. · forum.clozemaster.com, 15 Oct 2026
- Company
- The terms identify Language Innovation LLC as the entity that owns and operates Clozemaster websites, mobile apps, and related services. · clozemaster.com, 12 Oct 2026
- Company database profile
- Crunchbase describes Clozemaster as a private Somerville company with 1–10 employees. · crunchbase.com, 15 Oct 2026
- Company legal name
- The terms identify Language Innovation LLC as the owner and operator of Clozemaster websites, apps and services. · api.clozemaster.com, 15 Oct 2026
- Company profile
- LinkedIn lists Clozemaster as self-owned software development with one employee and headquarters in Somerville, Massachusetts. · linkedin.com, 15 Oct 2026
- Content limitation
- The FAQ notes that sentences and translations come from a user-curated dataset and may contain errors, which users can report in the game. · api.clozemaster.com, 12 Oct 2026
- Data deletion
- Users can delete their account, after which Clozemaster says it retains aggregate or anonymous activity data. · clozemaster.com, 12 Oct 2026
- Documentation
- The help center contains articles covering subscriptions, offline play, TTS voices, CSV or TSV collection uploads, review intervals and account deletion. · docs.clozemaster.com, 15 Oct 2026
- Free plan
- Yes · clozemaster.com, 20 Sept 2026
- Frequency ordering
- Clozemaster selects the least common word in a sentence from the language's most frequent 10,000 words when frequency data exists. · api.clozemaster.com, 15 Oct 2026
- Language coverage
- The service advertises more than 50 languages and over 170 language pairings on its home page. · clozemaster.com, 15 Oct 2026
- Languages offered
- 75 · clozemaster.com, 20 Sept 2026
- Learning method
- Clozemaster teaches vocabulary through fill-in-the-blank exercises using sentences in context. · clozemaster.com, 12 Oct 2026
- Licence
- The service is proprietary: its terms grant limited personal access and prohibit copying, resale, automated access and reverse engineering. · api.clozemaster.com, 15 Oct 2026
- Limit: course structure
- Think in Italian rated Clozemaster as strong for contextual vocabulary but lacking structured progression, grammar teaching and speaking practice. · thinkinitalian.com, 15 Oct 2026
- Limit: current bugs
- The bug-report index lists 2026 reports about broken explanations, Android collection playback, wiped iOS review queues and crashes. · forum.clozemaster.com, 15 Oct 2026
- Limit: interface
- FluentU found the dashboard visually cluttered and said simple icons were difficult to interpret at first. · fluentu.com, 15 Oct 2026
- Limit: sentence quality
- The official FAQ warns that Tatoeba sentences and translations are user-curated, so errors can occur. · api.clozemaster.com, 15 Oct 2026
- Limit: speech recognition
- A forum bug report records Android speaking mode failing when the device could not bind to a speech-recognition service. · forum.clozemaster.com, 15 Oct 2026
- Listening limit
- Pro listening practice is available for over 30 languages and only for Fast Track, Most Common Words, and Grammar Challenge collections. · api.clozemaster.com, 12 Oct 2026
- Mobile apps
- Yes · clozemaster.com, 20 Sept 2026
- Notable 2026 change
- The Clozemaster forum shows an October 9, 2026 discussion about new review logic and interface changes, alongside user requests to retain the older workflow. · forum.clozemaster.com, 15 Oct 2026
Where Clozemaster stands on Freedom251
- Language learning apps#9 of 278
- Spanish Learning Apps#3 of 60