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Fcitx5 for Android vs Sumire Japanese Keyboard: catalog facts
Fcitx5 for Android	Sumire Japanese Keyboard
Free Free and open source under the LGPL-2.1 licence.	Free Free and open source under the MIT licence.
Android	Android
Many Chinese input schemes built in RIME plugin with custom schema import	All conversion and learning data stays on the device Kana and romaji input with candidate conversion
Keyboard layout is not customizable yet Google Play builds use a different signature from GitHub and F-Droid builds	The F-Droid Lite build leaves out some features of the full app Project documentation is mostly in Japanese
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1	License: MIT
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.