Hanzi Rush (汉字冲刺) is a free web and mobile application for learning Chinese characters (Hanzi). It uses Speed-FSRS, an adaptive spaced repetition algorithm that optimizes review intervals based on both accuracy and response speed. It supports HSK 2.0 (levels 1-6), HSK 3.0 2021 standard (levels 1-9), YCT (levels 1-4), and 214 Kangxi radicals with 17,981 vocabulary entries.

Yes. HSK levels 1-2 are free forever with all 6 training modes and unlimited sessions. Premium unlocks HSK levels 3-9, advanced analytics, and priority support.

What is Speed-FSRS and how is it different from regular spaced repetition?

Speed-FSRS is an enhanced version of the FSRS-5 spaced repetition algorithm. Unlike traditional SRS that only considers whether you got an answer right or wrong, Speed-FSRS also factors in how fast you responded. Faster correct answers indicate stronger memory, resulting in longer review intervals. This reduces unnecessary reviews while ensuring difficult characters are seen more often.

Which HSK levels does Hanzi Rush support?

Hanzi Rush supports both HSK standards: HSK 2.0 (levels 1-6, ~5,000 characters) and HSK 3.0 2021 (levels 1-9, 11,092 entries). It also includes YCT levels 1-4 (630 entries for younger learners) and all 214 Kangxi radicals with stroke order animations.

How is Hanzi Rush different from Duolingo or other Chinese learning apps?

Hanzi Rush focuses specifically on Chinese character mastery rather than general language courses. Key differences: (1) Speed-FSRS algorithm adapts to your response speed, not just accuracy; (2) 6 specialized training modes including stroke order animation and brush-style writing practice; (3) Full HSK 3.0 (2021) support with 11,000+ entries; (4) Database-backed progress that persists across devices; (5) Offline-first mobile app with automatic sync.

Does Hanzi Rush work offline?

Yes. The web version works as a Progressive Web App (PWA) with offline support. The mobile app (iOS and Android) is fully offline-first — you can train without an internet connection, and your progress automatically syncs when you reconnect.

What training modes are available?

Hanzi Rush offers 6 training modes: (1) Learning — study new characters with pinyin and translations; (2) Test — recall characters under time pressure; (3) Quick Challenge — rapid-fire speed drills; (4) Voice Input — speak pinyin using speech recognition; (5) Stroke Order — watch animated stroke sequences; (6) Writing Practice — draw characters with brush-style calligraphy and ink effects.

Terms of Service | Hanzi Rush

1. Acceptance of Terms

By accessing or using Hanzi Rush, you agree to be bound by these Terms of Service and all applicable laws and regulations.

2. Description of Service

Hanzi Rush is an educational application designed to help users learn Chinese characters through spaced repetition and interactive exercises.

3. User Accounts

You may use Hanzi Rush as a guest or create an account. If you create an account, you are responsible for maintaining the security of your account and for all activities that occur under your account.

4. Acceptable Use

You agree not to:

Reverse engineer or attempt to extract the source code
Interfere with or disrupt the service
Use automated systems to access the service
Use the service for any illegal purposes

5. Intellectual Property

All content provided through Hanzi Rush, including but not limited to text, graphics, logos, and software, is the property of Hanzi Rush or its content suppliers and is protected by intellectual property laws.

6. Disclaimer

Hanzi Rush is provided "as is" without any warranties. We do not guarantee that the service will be error-free or uninterrupted.

7. Limitation of Liability

To the fullest extent permitted by law, Hanzi Rush shall not be liable for any indirect, incidental, special, consequential, or punitive damages resulting from your use of the service.

8. Governing Law

These Terms are governed by the laws of Germany and the European Union. Any disputes shall be subject to the exclusive jurisdiction of the courts in Düsseldorf, Germany.

9. Right of Withdrawal (EU Consumers)

EU consumers have the right to withdraw from digital purchases within 14 days without giving any reason, unless the digital content has been accessed/downloaded with express consent.

10. Changes to Terms

We reserve the right to modify these terms at any time. Continued use of the service after changes constitutes acceptance of the new terms.

11. Contact

For any questions regarding these Terms, please contact us at:

Email: support@hanzirush.com