Clozemaster vs OptiLingo
Clozemaster
clozemaster.comOptiLingo
optilingo.comSide by side
| Figure | Clozemaster | OptiLingo |
|---|---|---|
| Price from | $5/mo | $0.50/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | — |
| Plans published | 6 | 6 |
| Spec score · Language learning apps | 9.3 (#6) | 8.5 (#56) |
| Free plan | Yes | No |
| Languages offered | 75 | 20 |
| Learning method | Clozemaster teaches vocabulary through fill-in-the-blank exercises using sentences in context. | Guided Immersion uses high-frequency phrases in real-world contexts, along with listening and repetition. |
| Mobile apps | Yes | Yes |
| Offline lessons | Yes | No |
| Personalized review | Yes | Yes |
| 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. | The privacy policy says OptiLingo uses technical, organizational, administrative, and physical measures intended to protect personal information, and states that no security measures are perfect or impenetrable. |
| Support | Users can submit account-linked questions, feedback, language requests and feature requests through the contact form. | The contact page invites users to submit a support form and says the team will get back to them ASAP. |
Plans
Clozemaster
- FreeFree
- FreeFree
- Pro Monthly$8 a month
- Pro Yearly$60 a year
- Clozemaster Pro MonthlyPrice not published
- Clozemaster Pro YearlyPrice not published
OptiLingo
- Annual$5.99 a year
- Quarterly$7.99 a month
- Monthly$9.99 a month
- Annual Plan$5.99 a year
- Quarterly Plan$7.99 a month
- Monthly Plan$9.99 a month
In their own words
Clozemaster
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.