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Mnemosyne vs Parley: catalog facts
Mnemosyne	Parley
Free Free and open source.	Free Free and open source as part of the KDE applications.
Windows, macOS, Linux	Windows, Linux
Spaced-repetition scheduling that focuses on cards you forget Uncluttered interface for newcomers	Spaced repetition scheduling for reviews Several training modes, including multiple choice and written answers
Smaller community and fewer shared decks than Anki Plain, older-style interface	No mobile apps Desktop interface feels dated next to app-based trainers
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0-or-later
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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