Vietnamese live captions and productivity tool for group settings
For deaf and hard of hearing people.
coming soon
Download for free
Download on theApp Store
Everything you need to follow Vietnamese group settings
Four tools built for deaf and hard of hearing Vietnamese speakers.
Follow whoever is speaking
- Captions the active voice at any moment
- Works at dinner tables, parties, and social gatherings
- Place the phone in the centre of the group
- Any accent, any pace
For multilingual groups
- Each person speaks their own language
- You read in yours, in real time
- 60+ languages, no switching
- For international families, mixed-language groups, travel
Transcribe any group conversation
- Record and get the full conversation in writing
- Organised by speaker
- Review who said what after the fact
- Any group size, any language
Key points from any group discussion
- Decisions and takeaways extracted automatically
- Useful for group meetings and community discussions
- Organised into clear sections
- Works on any saved recording
Download for free
Download on theApp StoreEvery situation covered
Designed for the real moments that matter — not just quiet controlled environments.
A Tết (Lunar New Year) family gathering where the whole extended family comes together and fast Vietnamese fills every room — grandparents speaking Northern varieties, parents in Southern, cousins from abroad. Captio AI captions each voice so you follow the whole celebration.
A family Sunday lunch in Hanoi or Ho Chi Minh City where fast conversational Vietnamese makes lip-reading a six-tone challenge at full speed. Captio AI gives you real-time captions of every voice at the table.
A neighbourhood gathering or community event in Vietnam where multiple speakers contribute quickly in colloquial Vietnamese and the conversation moves faster than any careful speech model prepares for. Captio AI captions each contributor.
A multigenerational family gathering where grandparents speak Northern Vietnamese and relatives from Ho Chi Minh City speak Southern — different consonant inventories at the same table. Captio AI follows both varieties.
A gathering with friends at a cà phê or bún bò quán where Vietnamese and English mix freely among younger speakers. Captio AI captions the full exchange without adjustment.
A Vietnamese diaspora community event in Australia, France, or the US where overseas Vietnamese and Vietnam-born Vietnamese varieties appear in the same conversation. Captio AI handles both.
Most accurate and fastest models
word accuracy
independent benchmark, 2025
real-time captions
first word appears as you speak
Download for free
Download on theApp Store
Built to keep you in the conversation, not just in the room
Captions whoever is speaking
Captio AI follows the dominant voice at any moment — whoever is loudest in the microphone's direction. In a group conversation, this tracks the active speaker naturally.
Works through background noise
Restaurants, living rooms, parties, outdoor gatherings. Moderate background noise does not prevent accurate captions — Captio AI is built for real environments, not quiet rooms.
Place it in the centre and forget it
Put the phone on the table or in the middle of the group, microphone facing the conversation. No positioning it after every speaker change, no adjusting between voices.
Less effort, less fatigue
The cognitive load of following a group conversation by lip-reading and reconstructing speech is exhausting. Captio AI handles the following so you can direct your energy toward actually being in the conversation.
60+ languages
For multilingual families, mixed-language social groups, or gatherings where people switch between languages mid-conversation. No setup required between language changes.
No setup between conversations
Open the app and place the phone. No configuration per setting, no briefing the group, nothing to manage between conversations. It works for any group, in any situation.
Why Vietnamese is hard to understand
Six tones — invisible on lips
- Vietnamese tones distinguish meaning on every syllable and none of them are visible
- Vietnamese has six lexical tones: flat (level), falling, questioning/rising, broken/creaky, tumbling, and sharp. These tones distinguish meaning on every single syllable — 'ma' means mother, ghost, rice seedling, cheek, tomb, or horse depending on its tone. Tone is carried by pitch and voice quality, not by mouth shape. For a deaf person lip-reading Vietnamese, the tones are entirely invisible — and without tone, individual syllables are fundamentally ambiguous.
Northern vs Southern phonology
- Hanoi and Ho Chi Minh City Vietnamese have different consonant inventories
- Northern Vietnamese (Hanoi) and Southern Vietnamese (Ho Chi Minh City) differ significantly in phonology. The North distinguishes six initial consonants that the South merges — /d/, /gi/, /r/ all merge into one sound in the South, while the North keeps them distinct. The North maintains all six tones clearly; the South merges the hỏi and ngã tones into one. A deaf person calibrated to Northern Vietnamese encounters a different consonant and tonal system in a Southern Vietnamese gathering — and vice versa.
Rapid tonal speech at social pace
- Vietnamese family gatherings run at high speed with tonal distinctions compressed to minimum duration
- Vietnamese social conversation at family gatherings moves at high speed — the tonal distinctions that carry meaning are produced at the briefest possible durations, and the pace of conversation leaves minimal time for visual processing. Unlike in careful speech where each syllable is clearly produced, fast social Vietnamese compresses both the tonal and segmental content into a rapid stream that visual processing alone cannot reconstruct.
Vietnamese-English code-switching
- Urban gatherings and diaspora communities shift between Vietnamese and English mid-sentence
- In Vietnam's urban centres and in overseas Vietnamese communities in the US, Australia, and France, educated speakers switch between Vietnamese and English mid-sentence: 'Anh ơi, hôm nay có meeting không?' The English segment is unannounced and carries specific content. For a deaf person tracking Vietnamese, the switch is a phonological shift to a completely different consonant system — and in diaspora social gatherings, this switching is frequent enough that it cannot be anticipated.
Diaspora vocabulary divergence
- Overseas Vietnamese speech diverges from Vietnam-spoken Vietnamese in ways that create comprehension gaps
- Overseas Vietnamese communities in the US (Vietnamese-American), Australia, and France have developed vocabulary and pronunciation patterns that diverge from Vietnamese spoken in Vietnam. At gatherings where diaspora families visit Vietnam, or at diaspora community events where Việt Kiều and recent migrants mix, vocabulary gaps and different phonological influences (English-accented Vietnamese in the US, French-accented in France) add to the existing challenges of lip-reading a six-tone language at social speed.
Download for free
Download on theApp Store1.3 million with significant hearing impairment in Vietnam. No national newborn screening programme.
Vietnam has approximately 1.3 million people with significant hearing impairment, with estimates including mild impairment reaching 2.5 million, according to national surveys. The Ministry of Health has reported that 1,200 to 1,400 children are born with hearing impairments each year — a rate that highlights the urgency of early intervention infrastructure that Vietnam has not yet fully built. As of 2024, there is no nationwide universal newborn hearing screening programme, meaning many children are diagnosed late and enter school without audiological support.
The Ministry of Education and Training estimates approximately 180,000 people under age 18 are affected by hearing loss in Vietnam, with around 116,000 classified as deaf. Diagnostic services are concentrated in urban hospitals in Hanoi and Ho Chi Minh City, leaving rural and provincial populations with minimal access to audiological care. In community and family settings — the Tết gathering, the neighbourhood event, the Sunday family lunch — no formal communication support exists, and the cultural expectation that all family members participate actively creates significant pressure on deaf and hard of hearing people who have no way to follow a six-tone language at social speed.
Captio AI captions Vietnamese in real time — across Northern and Southern varieties, including the fast conversational speech of family gatherings and the Vietnamese-English code-switching of urban and diaspora communities — so the Tết celebration, the family lunch in Hanoi, and the neighbourhood gathering are conversations a deaf person can follow without the exhaustion of reading six tones off people's lips.
Download for free
Download on theApp StoreWhat you hear stays with you.
Gone the moment it ends
Captio AI processes your audio in real time and discards it immediately. Nothing is recorded. Nothing is kept.
Not a product
Your conversations are not something Captio AI sells, shares, or monetizes — to anyone, for any reason.
Not used to train anything
What you say in a doctor's appointment or a job interview never ends up in a training dataset. Not ours. Not anyone else's.
Private by default
Download on theApp StoreCaptio AI supports 60+ languages
People love Captio AI
"Tết with twenty family members and everyone talking at speed is six tones collapsing into noise. I used to sit at the corner and watch. Captio AI on the table means I follow the whole reunion."
"Southern Vietnamese and Northern Vietnamese sound different enough that I struggle with the relatives from Hanoi. Captio AI follows both varieties in the same gathering."
"Overseas Vietnamese gatherings mix Australian-accented Vietnamese and Vietnam-born Vietnamese and English all at once. Captio AI follows the Vietnamese and I stop missing the parts where the conversation is fastest."
"Central Vietnamese is different from both North and South, and my family doesn't adjust for anyone. Captio AI captions the real conversation. It's the first time Tết has felt like something I'm fully part of."
"Tết with twenty family members and everyone talking at speed is six tones collapsing into noise. I used to sit at the corner and watch. Captio AI on the table means I follow the whole reunion."
"Southern Vietnamese and Northern Vietnamese sound different enough that I struggle with the relatives from Hanoi. Captio AI follows both varieties in the same gathering."
"Overseas Vietnamese gatherings mix Australian-accented Vietnamese and Vietnam-born Vietnamese and English all at once. Captio AI follows the Vietnamese and I stop missing the parts where the conversation is fastest."
"Central Vietnamese is different from both North and South, and my family doesn't adjust for anyone. Captio AI captions the real conversation. It's the first time Tết has felt like something I'm fully part of."
Download for free
Download on theApp StoreFrequently asked questions
Keep up with the group in Vietnamese.
Captio AI is free to start
coming soon
Download for free
Download on theApp Store