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Millie vs RIDI: catalog facts
Millie	RIDI
Paid Monthly subscription; the second month is currently free after the first paid month.	Free The viewer apps are free; books, webtoons and web novels are bought from the RIDI store.
macOS, Web	Windows, macOS, Android, iOS
Unlimited reading for one subscription E-books, audiobooks, webtoons and web novels in one place	Apps for phones, tablets and desktop computers Covers ebooks, webtoons and web novels
Korean-language service and catalog Requires a paid subscription	Only reads content from the RIDI store Desktop viewer is still a beta
Downloadable app, Web application, Hosted service	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account 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.