Early access beta · Vietnamese tone practice
Hear it right. Say it clearly. Get one helpful correction.
Vietnamese tone practice with clearer next steps.
Join early access after you understand the practice loop — value first, then email. No payment to join.
Join early access
Preview one correction · optional example before you give email
Pre-launch · No fluency or native-like promises · No fake scores · No payment to join
Hear
Say
Refine
Improve
Our Philosophy
Better conversations. Every day.
Vietnamese tone practice for learners who know the word but still get misunderstood. Hear a reference target, record, run a recording check before tone feedback, get one correction, and retry — one phrase at a time. Practice alone, no audience.
The problem
You can know the word and still be misunderstood.
Vietnamese pronunciation is not just vocabulary. Tone height, contour, timing, and pitch shape change whether locals understand you — even when your vocabulary is correct.
Textbook knowledge is not sound control.
You can read the tone marks and still produce a shape Vietnamese ears do not recognize.
Polite feedback hides mistakes.
Locals may smile and nod even when they did not understand. You need clearer signal than politeness.
Most apps do not show what your voice actually did.
Flashcards and chatbots rarely show your pitch contour or give one correction cue to retry.
Why this is different
Vietnamese tone practice — not a language course.
Vocabulary apps, transcription tools, and chatbot tutors solve different problems. Đúng Chưa? is built for tone practice without fake feedback.
Generic language tools
- Vocabulary lists and gamification
- Grammar exercises
- ASR transcription (words, not tone shape)
- Chatbot conversation practice
Đúng Chưa?
- One-phrase practice loop
- Recording check before tone feedback
- One correction cue per retry
- Refuses to judge bad audio
- Quiet-room practice first (MVP)
Not ASR. Not a chatbot tutor. Speech recognition can transcribe words while missing the tone movement locals hear. Đúng Chưa? focuses on tone practice — and stays honest when it cannot judge.
Honesty promise
No fake feedback from bad audio.
Recording check before tone feedback. If your recording is too noisy, clipped, or unstable, Đúng Chưa? tells you to retry — no fake feedback instead of pretending you passed or failed.
The practice trace is a reference to help you see movement. It is not marketed as perfect ground truth.
MVP scope
Quiet-room practice first.
Early builds target a reasonably quiet practice space. We do not claim café or street robustness yet — noisy audio may fail the recording check.
Product preview
Preview one tone correction.
See how Đúng Chưa? turns one phrase into one focused practice cue. No microphone needed for this preview.
No-mic preview
Example only
cà phê sữa đá
A familiar order where the tone shape can change what someone hears.
Reference vs. example attempt
A simple preview of the one-cue retry loop.
One example cue
The example attempt drops too early. Try keeping the tone steadier before the final movement.
You see one mismatch, then one focused retry cue.
This preview does not record audio. Early testing uses recording checks before tone feedback and works best in a quiet room.
After quiet practice
Stable tones earn real conversations.
Tone practice is for repetition first — one phrase until your tone stabilizes in a quiet room. Later, you take that phrase into real life: ordering coffee, asking directions, speaking to a local.
We do not promise instant street validation or noisy-environment scoring. Clearer tone shape makes being understood more likely — that is the goal.
Early access beta
Join serious Vietnamese learners testing tone practice without fake feedback.
Pre-launch only. One waitlist — no spam. Early testers help shape the practice deck.
What you are joining
- Vietnamese tone practice with a recording check before feedback
- One phrase, one correction — no fake scores from bad audio
- Early access updates when testing opens (pre-launch)
No fluency or “native-like” promises. No payment required to join. Preview one correction above if you want a demo first.
Preview one correction first · optional, no email needed
Voice recording is used for pronunciation analysis. Early test versions may store attempts for debugging and quality review only with clear consent.
You're on the list!
We'll reach out when early testing opens. Want to help us shape the initial practice deck? Tell us a bit about your struggles:
FAQ
Common questions
What is Đúng Chưa?
Đúng Chưa? is Vietnamese tone practice without fake feedback — for learners who know the word but still get misunderstood when speaking.
How does Đúng Chưa? help with Vietnamese tones?
Listen to a reference target, record your attempt, run a recording check, receive one tone correction if the audio is clear enough, and retry the same phrase.
Is Đúng Chưa? an AI tutor?
No. It is not a chatbot tutor or ASR app. If the recording check fails, the app refuses to give fake feedback. AI may help explain a correction — it does not pass or fail your tone.
Does Đúng Chưa? teach vocabulary?
Not as its primary job. It focuses on making the words you already know easier to say clearly. It is not a complete Vietnamese course.
Which Vietnamese accent does it support?
The early version uses a controlled practice deck and expands carefully as reference baselines expand. It does not claim full support for every Vietnamese dialect.
Can I use it in noisy places?
Early practice works best somewhere reasonably quiet. Noisy environments remain a recording-quality risk, and the app should not be framed as working anywhere.
Who is Đúng Chưa? for?
It is for Vietnamese learners who want clearer tone production and practical pronunciation feedback between lessons or self-study sessions.
Is Đúng Chưa? available now?
Đúng Chưa? is pre-launch. Join the early access beta waitlist for updates when testing opens.
How is it different from Duolingo or chatbot tutors?
It is Vietnamese tone practice with a recording check first — one phrase, one correction — not vocabulary drills, transcription, or chatbot conversation.
What does “one correction” mean?
One correction means each attempt focuses on one clear tone change — such as timing or tone movement — so you can retry without a wall of feedback.