Offline-first · your data stays on your phone
Fujikoe (藤声, “wisteria voice”) packs spaced-repetition flashcards, interpreter-style shadowing, kanji handwriting with on-device grading, and AI conversation practice — with the assistant of your choosing — into one app that never phones home.
Get it on Google Play, Email me for closed testing Why it works
234 starter cards across 14 categories, SM-2 scheduling, and Anki .apkg import for the decks you already own.
Three-pass listening (normal → syllable-by-syllable → normal), then speak along — with an on-device mic check that tells you what it heard.
Trace on genkouyoushi-style paper with radical breakdowns and mnemonic stories. On-device recognition grades what you drew.
Nine roleplay scenes — konbini, airport, izakaya small talk — powered by your own API key: Claude, any OpenAI-compatible provider, or Gemini.
Write a little every day. Get focused corrective feedback: what worked, what to fix, and how a native speaker would say it.
One-file JSON backup you keep wherever you like. No account, no sync server, nothing to breach.
Every drill maps to a research literature: spaced retrieval and practice testing (the two most effective study techniques in learning-science meta-analyses), shadowing for listening and prosody, handwriting for character memory, conversational interaction for speaking confidence, and focused written corrective feedback. The app spells this out — caveats included — in its “Will this actually work?” screen. 継続は力なり.