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Memento vs Mirumoji: catalog facts
Memento	Mirumoji
Free Free and open source under the GPL-2.0 licence.	Free Free and open source under the MIT licence.
Windows, macOS, Linux	Web, Self-hosted
Popup dictionary over subtitles using Yomitan dictionaries One-step Anki card creation via AnkiConnect	Clickable word lookups in subtitles Whisper-based subtitle generation
Focused on Japanese only macOS build is for Apple Silicon (arm64)	Only for learning Japanese Requires Docker setup
Downloadable app	Self-hosted
Open source	Open source
License: GPL-2.0	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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