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Perlego vs Millie: catalog facts
Perlego	Millie
Paid Paid membership gives access to the whole library.	Paid Monthly subscription; the second month is currently free after the first paid month.
Android, iOS, Web	macOS, Web
Over 1.5 million academic and professional titles One membership instead of buying individual textbooks	Unlimited reading for one subscription E-books, audiobooks, webtoons and web novels in one place
Requires an ongoing paid subscription Books are accessed through the service rather than owned as files	Korean-language service and catalog Requires a paid subscription
Downloadable app, Web application, Hosted service	Downloadable app, Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account 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.