| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | Yes | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | — | Yes |
| API | — | Yes |
| Plans published | 2 | 7 |
| Spec score · Language learning apps | 8.1 (#126) | 9.3 (#3) |
| Free plan | Yes | Yes |
| Mobile apps | Yes | Yes |
| Personalized review | Yes | Yes |
| Spaced repetition | The service brings saved chunks back for review before they are forgotten. | The scheduling algorithm selects individualized review intervals from a learner’s recall results and history. |
| Support | The maker lists [email protected] as the contact address for questions about the service and its policies. | Technical support is offered through a contact form and support email, with in-course problem reporting available. |
| What it does | Chunks teaches languages through ready-made phrases and collocations, using AI feedback and spaced repetition. | SuperMemo provides language-learning courses and spaced-repetition study software for web and mobile users. |
