The only app that lets you hold a real conversation in Japanese — not repeat phrases, not fill in blanks. Practice speaking naturally with an AI that listens, responds, and gently corrects you, just like a fluent friend would.
No card required. Beta pricing locks in forever after trial.
See it in action
A real practice session. Sensei responds to what you actually say.
If you're already past the basics — already comfortable with how learning works — the textbook lesson plan is the wrong shape. You don't need streaks, leaderboards, or another quiz on past-tense conjugation.
You need a partner who'll meet you mid-conversation, model the natural form when you stumble, and know who Mac is the next time you mention him. A partner who speaks the dialect you are working on — the slang from your last trip, the grammar from your most recent log entry.
That's the only thing Kaiwaflow tries to be.
Hold space, speak, release. Sensei replies in your ears, not just your eyes. Optional fullscreen mode for hands-free practice with subtitles you can toggle off.
browser STT primary · Whisper fallbackImport your learning notes — paste text, upload a CSV, or bring vocabulary you've already collected. Sensei extracts context in one pass and knows about the Hokkaido trip, the dog you lost, the grammar from last Tuesday's log entry.
paste · CSV · vocab import · LLM-driven extractionSensei never interrupts to correct. Instead, she models the natural form back in her reply. A small chip below each message lets you see exactly what was tacitly fixed.
a different kind of language appKaiwaflow calibrates complexity to exactly where you are — vocabulary, grammar, and conversation pace all tuned to your level.
Paste notes, upload a CSV, or import vocabulary you've already collected. Sensei reads your context and makes it personal.
Sensei opens with a greeting that mentions someone or somewhere from your notes. Speak or type — whichever fits the moment.
Save anything Sensei says as an Anki card. Your library lives alongside the chat, browsable and exportable.
Free for 14 days. No card needed to start.
| Feature | 🌸 kaiwaflow | Duolingo | hellonora.ai | Langua |
|---|---|---|---|---|
| Real back-and-forth conversation | ✓ | ✗ | ✓ | ~ |
| Flow-first, corrections never interrupt | ✓ | ✗ | ~ | ✗ |
| Knows your vocabulary & context | ✓ | ✗ | ~ | ✗ |
| Available 24/7, no scheduling | ✓ | ✓ | ✓ | ✗ |
| Voice input & spoken responses | ✓ | ~ | ✓ | ✓ |
| Adapts to JLPT level in real-time | ✓ | ✗ | ✗ | ✗ |
| Multiple conversation modes | ✓ | ✗ | ~ | ~ |
| Export vocab to Anki | ✓ | ✗ | ✗ | ✗ |
| Designed for intermediate+ learners | ✓ | ✗ | ~ | ✓ |
✓ fully supported · ~ partial or limited · ✗ not available
No card required to start. Beta pricing locks in forever after your 14-day trial.
Cancel anytime · billed monthly or annually · secure via Stripe
Beta pricing is available to founding members only. Full launch price will be $19/mo. Lock this in now.
You are probably right for Kaiwaflow if:
Generic AI chatbots have no awareness of your level, don't track your mistakes, and don't adapt their teaching style. Kaiwaflow is purpose-built for Japanese conversation fluency: it reads your own learning notes and vocab imports, calibrates to your JLPT level, models corrections naturally in the flow of conversation rather than interrupting you, and builds a personal library of vocab and phrases you can export to Anki. It's not a chat interface — it's a practice partner that already knows you.
Both. Kaiwaflow supports voice input using your browser's built-in speech recognition, with Whisper as a fallback for higher accuracy (Pro). Sensei also speaks back to you via browser TTS on the Free plan, and high-fidelity Japanese voice (250k characters/month) on Pro. There's an optional fullscreen voice mode for hands-free practice with subtitles you can toggle off.
Kaiwaflow is coming soon. We're putting the finishing touches on the product and will be rolling out access to early signups first. Join the waitlist now to secure early-access pricing or your founding member badge.
Pro users get access to keigo and business Japanese modes, as well as JLPT-aligned vocabulary. That said, Kaiwaflow is built around conversation fluency first — it's ideal for people who want to speak Japanese comfortably. If your primary goal is to ace the written JLPT exam, tools like Bunpro or Anki may be a better primary focus, though Kaiwaflow complements them well for speaking practice.
Sensei never stops the conversation to say "that was wrong." Instead, if you use an unnatural form, she naturally weaves the correct version into her reply — so you hear it used properly in context. If you're curious, a small indicator below each message lets you see exactly what was tacitly adjusted. You keep talking; learning happens in the background.
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