Tool profile
Clozemaster: cost, fit and limits
Clozemaster is a language learning app made by Language Innovation LLC that drills vocabulary through fill-in-the-blank sentences across more than 170 language pairings, with spaced repetition, a free tier and AI features that the privacy policy describes.
What to know first
Clozemaster is a sentence-based language drill rather than a general flashcard app. Free covers the fill-in-the-blank drills, scoring, spaced repetition and word frequency tracking, and the homepage says everything needed to get fluent faster is free. A Pro tier adds advanced features, but the pricing page showed only Loading in place of prices, and the yearly plan has a 30-day money-back guarantee.
Clozemaster at a glance
| Maker | Language Innovation LLC, United States |
|---|---|
| Free plan | Yes |
| Entry price | Free |
| API access | No |
| Category | Best AI Flashcard Apps in 2026, rank 8 of 11 |
| Website | clozemaster.com |
Who Clozemaster is best for
Intermediate language learners
Sentence drills show a word in context and track progress by word frequency, which suits people past the beginner phase who need vocabulary.
Learners of less common pairings
With over 170 language pairings listed, a learner whose pair is missing from big deck libraries may still find sentences to drill.
People who want speaking practice
The privacy policy describes text to speech audio and speaking practice, which gives pronunciation work next to the typed or multiple-choice drills.
Clozemaster plans and pricing
| Plan | Price | What it includes |
|---|---|---|
| Free | Free | Fill-in-the-blank sentence drills, scoring, spaced repetition and word frequency tracking, with multiple choice or typed answers. |
| Pro | Not published (pricing page showed Loading) | Advanced features for power users, sold monthly or yearly; the yearly plan carries a 30-day money-back guarantee. |
| AI features | Plan placement not stated | The privacy policy mentions AI features such as follow-up questions on explanations; which plan includes them was not stated on the pages we opened. |
Checked November 2026.
What Clozemaster does
- Cloze sentence drills
- Each card hides a word in a sentence and asks you to supply it, either by choosing from options or by typing it. The vendor lists multiple choice and typed answers as the two modes, and scoring is shown for each drill.
- Word frequency tracking
- Progress is tracked against how common each word is, so learners can see how much everyday language they now cover and which common words they still miss in a given language.
- Quick Capture and follow-up questions
- The privacy policy describes entries a learner saves while reading and follow-up questions on explanations, both of which use AI features, so text a learner writes in these places is sent to an AI provider to generate a reply.
- Text to speech and speaking
- Audio of sentences and speaking practice are described in the privacy policy, with processing by outside providers named in the policy, so speech and audio features involve third parties as well as Clozemaster.
- Translation
- DeepL is named for translation in the privacy policy, which shows where translated sentences come from. Sending text to a translation provider is one more place where learner text leaves the vendor's own systems.
How Clozemaster handles your data
The privacy policy says AI features send the text users write to OpenAI to generate a response, and that Clozemaster does not use personal information, including AI feature inputs, to train AI models. Account and learning data are kept until deleted and are removed within 10 days of account deletion, except tax records kept for 6 years, and IP addresses are kept for up to a year. Main systems are in the United States, with some providers in Germany, Italy, the UK, Ecuador and Bosnia and Herzegovina, using the EU-US Data Privacy Framework and Standard Contractual Clauses.
Where Clozemaster falls short in practice
- Languages only. The product teaches words in sentences, so a learner of anatomy, law or code cannot build their own decks here as far as the pages show.
- Pro price unseen. The pricing page showed Loading, so the Pro cost is unknown from our reading, although a 30-day money-back guarantee applies to the yearly plan, which reduces the risk of trying it.
- Text goes to a US provider. AI inputs are sent to OpenAI, and systems are mainly in the United States, which matters for EU-based schools, though the policy cites the EU-US Data Privacy Framework and Standard Contractual Clauses for transfers.
Works with
Alternatives to Clozemaster
Clozemaster: common questions
Is Clozemaster free?
Yes, the core drills are free. The homepage says everything you need to get fluent faster is free, with fill-in-the-blank sentences, scoring, spaced repetition and word frequency tracking. A Pro tier adds advanced features, but the pricing page showed Loading instead of prices, so the cost is not stated here.
How many languages does Clozemaster cover?
The homepage lists fill-in-the-blank sentences for more than 170 language pairings across more than 50 languages. We did not check the quality or size of each pairing, and a less common pair may have fewer sentences than a major one, so test your own pair first.
Does Clozemaster use AI?
Yes, according to its privacy policy. AI features send the text a user writes to OpenAI to generate a response, and the vendor says it does not use that text to train AI models. Quick Capture entries and follow-up questions on explanations are among the features described there.
Can I make my own flashcard decks in Clozemaster?
The pages we opened describe sentence drills built by the service, not custom card decks, and name no deck import. If you need medical, legal or technical cards, an app such as Anki, Mochi or RemNote is a closer fit than Clozemaster.
Where does Clozemaster store my data?
The privacy policy says main systems are in the United States, with some providers processing data in Germany, Italy, the UK, Ecuador and Bosnia and Herzegovina. It cites the EU-US Data Privacy Framework for certified US providers and Standard Contractual Clauses with a UK Addendum for others.