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ATOK vs Fcitx 5: catalog facts
ATOK	Fcitx 5
Paid Sold as the ATOK Passport subscription with a free trial.	Free Free and open source under the LGPL 2.1 or later.
Windows, macOS, Android, iOS	Linux
Conversion engine that adapts to your typing habits 63 optional genre dictionaries	Supports many languages through numerous input engines Slim core extended with addons
Subscription required after the trial Website and interface are in Japanese	Linux and Unix only Setup involves installing separate engines and configuring the environment
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: LGPL-2.1-or-later
Account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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