Tamil live captions and productivity tool for phone & video calls
For deaf and hard of hearing people.
coming soon
Download for free
Download on theApp Store
Everything you need to follow Tamil phone & video calls
Four tools built for deaf and hard of hearing Tamil speakers.
Follow the call in real time
- Captions appear word by word as the other person speaks
- Works on any call — no app integration required
- Put the call on speaker and point the microphone toward it
- Handles compressed call audio accurately
International and foreign-language calls
- They speak their language — you read in yours
- Translates in real time as they speak
- 60+ languages, no setup
- For family abroad, international business, or travel
Transcribe any call recording
- Record the call and upload for a complete written transcript
- Review instructions, information, and decisions after
- Organised by speaker
- Works on any call recording
Key information extracted from any call
- Important points pulled from any call transcript
- Useful for medical calls, customer service, and work calls
- 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 call with parents or grandparents in Chennai or a relative in Madurai. Family conversations carry regional Tamil accents and the shorthand of close relationships. Captio AI captions everything said.
A project call run in Tamil from a Chennai IT company or an online meeting with Tamil colleagues. Business Tamil with English technical vocabulary. Captio AI keeps pace with both.
A callback from Apollo Hospital in Chennai or a query from the neighborhood medical shop in Tamil. Medical calls use formal vocabulary at speed. Captio AI shows the full message in text.
An Indian Bank automated menu or a TNEB bill payment call in Tamil. Automated menus give you one chance. Captio AI captions each option before the timeout.
A call from the Tamil diaspora in the UK, Canada, Australia, or Malaysia. Diaspora Tamil carries foreign-language influence on vocabulary and rhythm. Captio AI handles it accurately.
A WhatsApp video call with family in Coimbatore or a Zoom meeting with a Sri Lankan Tamil team. All video call apps work the same way — put the call on speaker, open Captio AI, read the captions.
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 for the calls you have been avoiding
Captions as they speak
Words appear on screen word by word while the other person is still talking. You read what they say at the same pace everyone else hears it — no delay, no reconstruction.
Works on any call app
Captio AI does not need to integrate with any platform. Put the call on speaker, point the microphone toward the audio, and read the captions. It works the same way for any app on any device.
No more asking for repeats
Every word is on screen as it is said. If you missed something, glance at the caption rather than interrupting the call — the full sentence is there.
Handles call audio accurately
Compressed phone audio is less clean than in-person speech. Captio AI is built for real-world audio conditions, including the reduced quality of standard phone and VoIP calls.
Any language
For calls with family abroad, international colleagues, or foreign-language customer service. Live Translator captions and translates in real time with no manual setup.
Record and review after
Record any call and upload it to Audio Transcription. Get a full written record of everything said — useful for medical instructions, work decisions, and anything worth having in writing.
Why Tamil is hard to understand
Diglossia: two registers, one call
- Formal and spoken Tamil are linguistically distinct
- Tamil has a formal literary register (used in official calls, news, and formal medical contexts) and a spoken/colloquial register that differ in vocabulary, verb forms, and even basic pronouns. A deaf caller tracking phonological shapes from everyday conversation will not recognize the formal register on an official or medical call — and formal Tamil callers do not adapt to spoken Tamil automatically.
Three-way retroflex series
- Dental, alveolar, and retroflex consonants look identical
- Tamil has three series of dental-alveolar-retroflex stops and nasals (த/ற/ட, ந/ன/ண). The retroflex consonants (ட, ண, ழ, ள) are produced by curling the tongue back against the palate — with no visible lip change. These three-way contrasts are phonemically important, completely invisible on lips, and distinguishable only by sound.
India-Sri Lanka dialect gap
- Indian Tamil and Jaffna Tamil are phonologically distinct
- Sri Lankan Tamil (spoken in Jaffna, Colombo, and Trincomalee) maintains archaic consonant contrasts, different vowel lengths, and distinct vocabulary compared to Indian Tamil varieties. A deaf caller from Chennai may not recognize the phonological shape of Jaffna Tamil on an international call — the two varieties have diverged significantly over centuries.
Vowel length collapse in fast speech
- Three vowel lengths merge under speed and compression
- Tamil has three vowel lengths (short, long, overlong) plus diphthongs, and these distinctions change word meaning. In fast casual speech, length distinctions collapse — particularly between short and long. On a phone call without hearing, the duration signal that separates vowel length categories is compressed by codecs and lost entirely.
Tamil-English code-switching
- Urban Tamil shifts phonological systems mid-sentence
- Urban Tamil speech in Chennai and among the diaspora switches rapidly between Tamil and English within single sentences. The phonological system shifts with each language — requiring a deaf caller to simultaneously track Tamil vowel harmony and consonant system in one moment, and English phonology in the next, without a boundary marker.
Download for free
Download on theApp StoreSixty-three million deaf and hard of hearing people in India — and Tamil Nadu records among the highest rates in the south
India is home to approximately 63 million deaf and hard of hearing people, with hearing disability the second most common disability in the country. NFHS-5 (2019–21) data shows that Tamil Nadu consistently records higher hearing disability rates than many northern states, with southern states as a cluster showing elevated prevalence. In Sri Lanka, WHO regional estimates place significant hearing loss at around 2–3% of the population — a meaningful number in a country of 22 million.
Tamil Sign Language (TSL) is used in deaf communities in Tamil Nadu and by Sri Lankan Tamils, with the two variants differing substantially. The Tamil Nadu state government has established cochlear implant programs for newly diagnosed children — but the large adult population with hearing loss navigates telephone communication without formal support. There is no mobile relay telephone service available through Jio, BSNL, or Dialog (Sri Lanka) for deaf Tamil callers. Indian Sign Language interpreters remain scarce outside Chennai.
Captio AI lets a deaf Tamil speaker in Coimbatore follow an Apollo Hospital callback, navigate an Indian Bank automated menu, or join a WhatsApp video call with family in Jaffna — reading accurate Tamil captions in real time, without relay infrastructure or interpreter availability.
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
"Apollo Hospital callbacks are in formal Tamil — completely different from the Tamil I speak at home in Chennai. Captio AI handles the formal register accurately. I understood my consultant's instructions without asking for a repeat."
"Sri Lankan Tamil and Indian Tamil sound different enough that I struggle on calls from Chennai relatives. Captio AI reads Jaffna Tamil accurately. WhatsApp calls with relatives in Chennai are readable now."
"Tamil-English code-switching in diaspora calls — my UK Tamil community switches between Tamil and English mid-sentence constantly. Captio AI follows both. I'm in every WhatsApp call now instead of dropping off because I can't follow."
"Indian Bank IVR menu in Tamil — the retroflex consonants like ட and ண sound the same to me now. Captio AI shows the correct text. I handle my own banking calls without my son having to do them for me."
"Apollo Hospital callbacks are in formal Tamil — completely different from the Tamil I speak at home in Chennai. Captio AI handles the formal register accurately. I understood my consultant's instructions without asking for a repeat."
"Sri Lankan Tamil and Indian Tamil sound different enough that I struggle on calls from Chennai relatives. Captio AI reads Jaffna Tamil accurately. WhatsApp calls with relatives in Chennai are readable now."
"Tamil-English code-switching in diaspora calls — my UK Tamil community switches between Tamil and English mid-sentence constantly. Captio AI follows both. I'm in every WhatsApp call now instead of dropping off because I can't follow."
"Indian Bank IVR menu in Tamil — the retroflex consonants like ட and ண sound the same to me now. Captio AI shows the correct text. I handle my own banking calls without my son having to do them for me."
Download for free
Download on theApp StoreFrequently asked questions
Follow every call in Tamil.
Captio AI is free to start
coming soon
Download for free
Download on theApp Store