Captio AI
🦻 Accessibility + 💻 Productivity App

Tamil live captions and productivity tool for doctor appointments

For deaf and hard of hearing people.

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Captio AI app showing live captions

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Use Cases

Every situation covered

Designed for the real moments that matter — not just quiet controlled environments.

🩺GP and primary care visits

Government hospital OPD visits in Tamil Nadu at district hospitals, where consultation time is short and patient volumes are high.

🔬Specialist consultations

Specialist consultations at major public hospitals in Chennai, where medical terminology is dense and clinical pace is fast.

💊Pharmacy conversations

Pharmacy counter consultations at a medical shop, where the pharmacist explains dosage in Tamil mixed with English drug names.

🦷Dental appointments

Dental appointments, where the dentist continues speaking during treatment and the patient cannot turn to lip-read.

🧠Mental health sessions

Mental health consultations at a psychiatry clinic, where follow-up questions are frequent and tone carries clinical meaning.

🚑Emergency and urgent care

Private clinic visits in smaller towns like Madurai, Coimbatore, or Trichy, where the regional Tamil accent may differ from Chennai speech.

Performance

Most accurate and fastest models

Tamil
90.4%

word accuracy

independent benchmark, 2025

< 200ms
you speak
captions

real-time captions

first word appears as you speak

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Captio AI in everyday use
Why Captio AI

Built for the conversations where every word matters

Captions as the doctor speaks

Words appear on screen while the doctor is still talking. You read the diagnosis, drug name, or follow-up instruction at the same moment it is said — not after they have moved on.

Medical terminology handled accurately

Drug names, procedure names, clinical terms. Captio AI handles the vocabulary of a real consultation — not just everyday speech.

Review the appointment after

Record the consultation and upload it to Audio Transcription. Get a full written record of everything said — instructions, dosages, referrals — to review at home and share with a carer if needed.

Works in any clinical setting

Consultation rooms, hospital wards, A&E, dental chairs, pharmacy counters. Place the phone near the speaker and Captio AI captions whoever is talking.

Any language

For foreign-language doctors, specialists abroad, or appointments through an interpreter. Live Translator captions and translates in real time so you follow your diagnosis in the language you understand best.

100% private

Medical conversations are among the most sensitive there are. Captio AI processes audio in real time and discards it immediately. Nothing is recorded, stored, or shared.

Tamil

Why Tamil is hard to understand

Vowel length invisible

  • Short and long vowels look identical on lips
  • Tamil has five vowel pairs where length is the only difference — a/ā, i/ī, u/ū, e/ē, o/ō. The distinction is purely durational: the mouth holds the same position for longer, with no change in shape or visible movement. In a medical consultation, a deaf patient cannot tell 'malam' (stool) from 'mālam' (garland) — or more critically, cannot distinguish minimal pairs in drug names and dosage terms that rely on vowel length.

Retroflex consonants

  • Five retroflex sounds are invisible on the lips
  • Tamil has five retroflex consonants — ட, ண, ல, ழ, ற — produced with the tongue curled back toward the palate. The retroflex articulation happens inside the mouth and produces lip positions nearly identical to their dental or alveolar counterparts. In clinical speech, words distinguished only by their retroflex-versus-non-retroflex consonant are visually indistinguishable.

Diglossia in the clinic

  • Formal and colloquial Tamil are used in the same appointment
  • Tamil has one of the most pronounced diglossias of any living language. Formal written Tamil (sentamil) used in medical reports and institutional announcements sounds radically different from the spoken colloquial Tamil (koṭuntamiḻ) a doctor uses when explaining a diagnosis. A deaf patient fluent in one register may not recognise words spoken in the other, even in a single consultation.

Sri Lankan vs Indian Tamil

  • Tamil from Sri Lanka and Tamil Nadu sound distinctly different
  • Sri Lankan Tamil has retained older consonant distinctions and developed different vowel qualities from Indian Tamil. The varieties spoken in Jaffna, Colombo, Chennai, and Madurai all differ measurably in phonology and vocabulary. A deaf Tamil speaker from Chennai attending a clinic in London serving the Sri Lankan Tamil diaspora — or vice versa — encounters a different set of phoneme patterns in the same language.

Tamil–English code-switch

  • Clinical Tamil inserts English terms without transition
  • In urban Tamil Nadu and Sri Lanka, doctors embed English terms — 'BP', 'ECG', 'sugar' (for diabetes), 'injection' — into Tamil sentences. A deaf patient following Tamil lip patterns is abruptly confronted with English phoneme structure, a different rhythm, and different mouth shapes, mid-sentence and without warning.

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The Challenge

63 million Indians with hearing loss. Tamil Nadu screening without clinical communication support.

India has approximately 63 million people with significant auditory impairment according to WHO estimates, representing 6.3% of the population. Hearing disability is the second most common cause of disability in India and the leading sensory deficit, with rural populations disproportionately affected. Tamil Nadu is among the states that have run regular hearing screening camps and has been cited as a relatively proactive state on the NPPCD (National Programme for Prevention and Control of Deafness). A 2009 study published in PMC examined costs and health effects of hearing screening delivery in Tamil Nadu, finding that early identification and hearing aid provision is cost-effective — but implementation remains incomplete.

Screening identifies people with hearing loss; it does not solve communication access inside the clinical encounter. India has no statutory requirement for hospitals to provide sign language interpreters. Indian Sign Language (ISL) was adopted as an official language in 2023, but the 2011 census data had already found that 73.9% of Indians aged 15–59 with hearing disability were only marginal workers — a figure that reflects decades of inadequate communication access in education and employment. Healthcare access compounds the problem: a deaf patient who cannot follow medical instructions is more likely to misuse medication and miss follow-up appointments.

The Tamil-speaking deaf diaspora in Singapore, Malaysia, the UK, and Canada face an additional layer of complexity. Accessing healthcare in a country whose primary healthcare language is English or Malay — while communicating in Tamil at home — means a Tamil-speaking deaf adult navigates two language gaps simultaneously: the gap between their hearing loss and the clinical speech around them, and the gap between Tamil and the country's dominant clinical language.

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Privacy

What 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.

100% PRIVATE

Private by default

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Reviews

People love Captio AI

"My doctor at Government Stanley Hospital speaks fast colloquial Tamil mixed with English medicine names. I was missing the dosage every time. Now I place my phone on the consultation table and read everything in real time. First time I've left a consultation fully informed."

Kavitha Subramanian 🇮🇳
kavitha.s***@gmail.com
Moderate bilateral hearing loss, Chennai, Tamil Nadu

"The doctor in Madurai speaks Madurai Tamil which sounds different from Chennai Tamil. The accent was already hard for me to lip-read. Captio AI handles the regional variety accurately — I understand what I'm being prescribed."

Rajan Murugesan 🇮🇳
rajan.m***@gmail.com
Congenital profound deafness, Madurai, Tamil Nadu

"At the polyclinic in Singapore the doctor speaks English, but my follow-up call to a Tamil-speaking specialist in India is all Tamil. Captio AI works for both. I save transcripts from both appointments and compare them at home."

Preethi Nair 🇸🇬
preethi.n***@gmail.com
Mild-to-moderate sensorineural hearing loss, Singapore

"Sri Lankan Tamil pronunciation is different from Indian Tamil. Even Tamil speakers from India sometimes struggle to understand me. Captio AI handles the Sri Lankan variety without any difficulty — I finally understand my doctor's appointments."

Selvam Krishnamurthy 🇱🇰
selvam.k***@gmail.com
Age-related hearing loss, Colombo, Sri Lanka

"My doctor at Government Stanley Hospital speaks fast colloquial Tamil mixed with English medicine names. I was missing the dosage every time. Now I place my phone on the consultation table and read everything in real time. First time I've left a consultation fully informed."

Kavitha Subramanian 🇮🇳
kavitha.s***@gmail.com
Moderate bilateral hearing loss, Chennai, Tamil Nadu

"The doctor in Madurai speaks Madurai Tamil which sounds different from Chennai Tamil. The accent was already hard for me to lip-read. Captio AI handles the regional variety accurately — I understand what I'm being prescribed."

Rajan Murugesan 🇮🇳
rajan.m***@gmail.com
Congenital profound deafness, Madurai, Tamil Nadu

"At the polyclinic in Singapore the doctor speaks English, but my follow-up call to a Tamil-speaking specialist in India is all Tamil. Captio AI works for both. I save transcripts from both appointments and compare them at home."

Preethi Nair 🇸🇬
preethi.n***@gmail.com
Mild-to-moderate sensorineural hearing loss, Singapore

"Sri Lankan Tamil pronunciation is different from Indian Tamil. Even Tamil speakers from India sometimes struggle to understand me. Captio AI handles the Sri Lankan variety without any difficulty — I finally understand my doctor's appointments."

Selvam Krishnamurthy 🇱🇰
selvam.k***@gmail.com
Age-related hearing loss, Colombo, Sri Lanka

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FAQ

Frequently asked questions

Understand your diagnosis in Tamil.

Captio AI is free to start

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