Skip to content
SPECIFICTION
Get listed

Clozemaster

clozemaster.com

From $5/mo Free plan WebiOSAndroidAPI
Visit clozemaster.com
Spec score 9.3 #6 of 278 in Language learning apps

What it is

Clozemaster is a language-learning service built around fill-in-the-blank sentences in context. Learners answer by selecting a choice or typing the missing word, then review sentences again through spaced practice and word-frequency progress tracking. The service lists 75 languages, thousands of sentences in more than 50 languages, and over 170 language pairings. It runs on the web, Android, and iOS, with personalized review and offline lessons. Some sentences have ChatGPT explanations by default, while others can generate an explanation when requested. Sentence and translation data comes from Tatoeba’s user-curated, CC-BY dataset, which may contain errors. The Free plan costs nothing and allows 30 sentences per day.

Spec sheet

What it does
Clozemaster teaches vocabulary by asking learners to supply missing words in thousands of contextual sentences.Read 15 Oct 2026 · clozemaster.com
Free plan
YesRead 20 Sep 2026 · clozemaster.com
Mobile apps
YesRead 20 Sep 2026 · clozemaster.com
Support
Users can submit account-linked questions, feedback, language requests and feature requests through the contact form.Read 15 Oct 2026 · clozemaster.com
Company
The terms identify Language Innovation LLC as the entity that owns and operates Clozemaster websites, mobile apps, and related services.Read 12 Oct 2026 · clozemaster.com
AI explanations
Grammar and contextual explanations are supplied by stored or on-demand ChatGPT-generated responses that users can report for correction.Read 15 Oct 2026 · api.clozemaster.com
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.Read 15 Oct 2026 · github.com
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.Read 15 Oct 2026 · forum.clozemaster.com
Company database profile
Crunchbase describes Clozemaster as a private Somerville company with 1–10 employees.Read 15 Oct 2026 · crunchbase.com
Company legal name
The terms identify Language Innovation LLC as the owner and operator of Clozemaster websites, apps and services.Read 15 Oct 2026 · api.clozemaster.com
Company profile
LinkedIn lists Clozemaster as self-owned software development with one employee and headquarters in Somerville, Massachusetts.Read 15 Oct 2026 · linkedin.com
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.Read 12 Oct 2026 · api.clozemaster.com
Data deletion
Users can delete their account, after which Clozemaster says it retains aggregate or anonymous activity data.Read 12 Oct 2026 · clozemaster.com
Documentation
The help center contains articles covering subscriptions, offline play, TTS voices, CSV or TSV collection uploads, review intervals and account deletion.Read 15 Oct 2026 · docs.clozemaster.com
Frequency ordering
Clozemaster selects the least common word in a sentence from the language's most frequent 10,000 words when frequency data exists.Read 15 Oct 2026 · api.clozemaster.com
Language coverage
The service advertises more than 50 languages and over 170 language pairings on its home page.Read 15 Oct 2026 · clozemaster.com
Languages offered
75Read 20 Sep 2026 · clozemaster.com
Learning method
Clozemaster teaches vocabulary through fill-in-the-blank exercises using sentences in context.Read 12 Oct 2026 · clozemaster.com
Licence
The service is proprietary: its terms grant limited personal access and prohibit copying, resale, automated access and reverse engineering.Read 15 Oct 2026 · api.clozemaster.com
Limit: course structure
Think in Italian rated Clozemaster as strong for contextual vocabulary but lacking structured progression, grammar teaching and speaking practice.Read 15 Oct 2026 · thinkinitalian.com
Limit: current bugs
The bug-report index lists 2026 reports about broken explanations, Android collection playback, wiped iOS review queues and crashes.Read 15 Oct 2026 · forum.clozemaster.com
Limit: interface
FluentU found the dashboard visually cluttered and said simple icons were difficult to interpret at first.Read 15 Oct 2026 · fluentu.com
Limit: sentence quality
The official FAQ warns that Tatoeba sentences and translations are user-curated, so errors can occur.Read 15 Oct 2026 · api.clozemaster.com
Limit: speech recognition
A forum bug report records Android speaking mode failing when the device could not bind to a speech-recognition service.Read 15 Oct 2026 · forum.clozemaster.com
Listening limit
Pro listening practice is available for over 30 languages and only for Fast Track, Most Common Words, and Grammar Challenge collections.Read 12 Oct 2026 · api.clozemaster.com
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.Read 15 Oct 2026 · forum.clozemaster.com
Offline lessons
YesRead 20 Sep 2026 · clozemaster.com
Offline use
Pro users can download collections in the mobile apps and continue practicing without an internet connection.Read 15 Oct 2026 · clozemaster.com
Personalized review
YesRead 20 Sep 2026 · clozemaster.com
Practice modes
The product supports multiple choice, typed answers, transcription, listening-first cloze exercises and a hands-free radio mode.Read 15 Oct 2026 · news.clozemaster.com
Practice options
Learners can answer by choosing from multiple choice or typing the missing word.Read 12 Oct 2026 · clozemaster.com
Praise: authentic sentences
An Apple reviewer praised realistic sentences, broad phrase coverage and usefulness beyond beginner material.Read 15 Oct 2026 · apps.apple.com
Praise: community
FluentU highlighted the learner forum and subreddit as unusually active, supportive spaces.Read 15 Oct 2026 · fluentu.com
Praise: contextual learning
FluentU's reviewer liked the real-sentence cloze method and reported becoming absorbed in repeated rounds.Read 15 Oct 2026 · fluentu.com
Praise: customization
A Google Play reviewer praised real-source sentences, selectable input styles and optional grammar explanations.Read 15 Oct 2026 · play.google.com
Privacy and security
The privacy policy says Clozemaster uses reasonable safeguards to protect personal information and collects identifiers such as IP address and device ID.Read 12 Oct 2026 · clozemaster.com
Pro features
Pro includes sentence search, favoriting, customizable round sizes and review intervals, advanced web statistics, and offline mobile play.Read 12 Oct 2026 · api.clozemaster.com
Rating on Apple App Store
4.8 out of 5 from 2K ratingsRead 15 Oct 2026 · apps.apple.com
Rating on Google Play
4.6 out of 5 from 5.54K reviewsRead 15 Oct 2026 · play.google.com
Rating on Trustpilot
3.8 out of 5 from 2 reviewsRead 15 Oct 2026 · uk.trustpilot.com
Security and privacy statement
The terms say Clozemaster will not sell, rent or give personal information to third parties for marketing without explicit consent.Read 15 Oct 2026 · api.clozemaster.com
Self-hosting
The official terms describe hosted websites, mobile applications and related services, with no self-hosted deployment option documented.Read 15 Oct 2026 · api.clozemaster.com
Sentence source
The core sentence and translation corpus comes from Tatoeba under a Creative Commons Attribution license.Read 15 Oct 2026 · api.clozemaster.com
Spaced repetition
Sentences move through default review intervals of same day, one day, 10 days, 30 days and 180 days, with Pro customization.Read 15 Oct 2026 · docs.clozemaster.com
Teaching collections
Teachers can create shareable collections of up to 50 cloze sentences, and students can complete them without accounts.Read 15 Oct 2026 · clozemaster.com
Text-to-speech limitation
Audio quality and availability depend on the browser, device and operating system, with best support stated for Chrome, Safari and connected mobile apps.Read 15 Oct 2026 · api.clozemaster.com

Plans and prices

Free Free 30 sentences per day Read 20 Sep 2026 · clozemaster.com
Free Free 30 sentences per day · web and mobile play Read 15 Oct 2026 · clozemaster.com
Pro Monthly $8 a month recurring billing; cancel anytime unlimited sentences · advanced statistics · sentence search and favorites · custom review settings · listening practice · offline mobile play Read 15 Oct 2026 · staging.clozemaster.com
Pro Yearly $60 a year recurring billing; 30-day money-back guarantee unlimited sentences · advanced statistics · sentence search and favorites · custom review settings · listening practice · offline mobile play Read 15 Oct 2026 · staging.clozemaster.com
Clozemaster Pro Monthly Price not published Recurring billing; cancel anytime Unlimited sentence practice · advanced statistics · listening practice for supported languages and collections Read 12 Oct 2026 · api.clozemaster.com
Clozemaster Pro Yearly Price not published Recurring billing; cancel anytime Unlimited sentence practice · advanced statistics · listening practice for supported languages and collections · 30-day money-back guarantee Read 12 Oct 2026 · api.clozemaster.com

Every Clozemaster plan and price →

Strong points and limits

Strong points

  • Practice vocabulary in sentence context
  • 75 languages listed
  • Personalized review and offline lessons
  • Multiple-choice or typed answers
  • Free plan available

Limits

  • Free plan limited to 30 sentences daily
  • User-curated content may contain errors
  • Listening covers selected languages and collections

Who it suits

It suits learners who want contextual vocabulary practice across web and mobile devices. Teachers with Pro can create shared collections and view student answer results.

Verdict

Clozemaster focuses on repeated, contextual sentence practice with broad language coverage and mobile access. The free tier is capped daily, while Pro features and pricing vary by the listed plan details.

Where Specifiction places it

Alternatives to ClozemasterAll alternatives →