Compare software

AquaSKK vs azooKey: catalog facts
AquaSKK	azooKey
Best for: Japanese typists on macOS who want explicit control over kana-kanji conversion	Best for: Typing Japanese on a Mac with an open-source input method
Free Free and open source.	Free Free and open source.
macOS	macOS
Predictable conversion without morphological analysis Open source with build instructions All 3 strengths for AquaSKK Predictable conversion without morphological analysis Open source with build instructions Works offline	Neural kana-kanji conversion with Zenzai Live conversion while typing All 4 strengths for azooKey Neural kana-kanji conversion with Zenzai Live conversion while typing Personalization that adapts to your writing Open source and written in native Swift
SKK input style takes time to learn macOS only	macOS only Magic Conversions depend on an LLM and are optional
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for AquaSKK github.com/codefirst/aquaskk Catalog checked October 1, 2026	Official website Full listing and sources Sources for azooKey github.com/azooKey/azooKey-Desktop Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.