Clozemaster
8.7#4 in language learning appsFrom $60 a yearFree planAndroidiOSWebAPI
VisitClozemaster vs SuperMemo
What both publish
| Fact | Clozemaster | SuperMemo |
|---|---|---|
| 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. | SuperMemo introduced an external API in 2026 that exposes its SM-20 spaced-repetition technology to developers. |
| Free plan | Yes | Yes |
| Languages offered | 75 | 25 |
| Licence | The service is proprietary: its terms grant limited personal access and prohibit copying, resale, automated access and reverse engineering. | SuperMemo’s commercial algorithm implementations remain proprietary trade secrets rather than open-source software. |
| Mobile apps | Yes | Yes |
| Offline lessons | Yes | Yes |
| Personalized review | Yes | Yes |
| Rating on Apple App Store | 4.8 out of 5 from 2K ratings | 4.2 out of 5 from 132 ratings. |
| Rating on Google Play | 4.6 out of 5 from 5.54K reviews | 3.8 out of 5 from 905 reviews. |
| Rating on Trustpilot | 3.8 out of 5 from 2 reviews | 3.7 out of 5 from 1 review. |
Clozemaster plans
- FreeFree
- Pro Monthly$8 a month
- Pro Yearly$60 a year
- Clozemaster Pro Monthly—
- Clozemaster Pro Yearly—
SuperMemo plans
- Premium 1 monthzł35.99 a month
- Premium 12 monthszł359 a year
- API Starter€49 a month
- Single coursezł59.90 a year
- API Grow€89 a month
- API Scale€399 a month
Pick Clozemaster if…
Clozemaster suits learners who want vocabulary practice in sentence context across web and mobile devices. Pro may suit learners seeking unlimited practice and offline mobile play, or teachers who want to share collections and review results.
Pick SuperMemo if…
SuperMemo suits language learners looking for courses with placement tests, review and speech practice. Its listed desktop, mobile and web options may suit learners who want access across device types.