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Pinyin Web & EPUB and topolects vs Du Chinese: catalog facts
Pinyin Web & EPUB and topolects	Du Chinese
Free Free and open source under the Apache-2.0 license.	Freemium Free to try, with paid plans for full access to the library.
Android	Android, iOS, Web
Adds pronunciation guides to any Chinese website or EPUB Supports Mandarin, Cantonese, Teochew and Wenzhou	Large library graded by level Instant word lookup and grammar notes
Android only Aimed at Chinese learners; translations are word by word	Full library requires a paid plan Focused on reading and listening rather than speaking or writing
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: Apache-2.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.