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Ciyue vs Aard 2: catalog facts
Ciyue	Aard 2
Free Free and open source under the MIT licence; AI translation uses your own provider.	Free Free and open source under the GPL-3.0.
Windows, Linux, Android	Android
Opens MDX and MDD dictionary files Searches multiple dictionaries at once	Offline Wikipedia and dictionary lookups Bookmarks and lookup history
You supply the dictionary files yourself AI translation depends on a third-party service	Dictionary files must be downloaded separately Interface is plain
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
No account needed	No account needed
Not stated if it works offline	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.