Portuguese 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 Portuguese phone & video calls
Four tools built for deaf and hard of hearing Portuguese 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.
Mãe calling from Porto, prima calling from Salvador, avó from Coimbra. Portuguese family calls cross an ocean and multiple accent varieties — each person at full speed in their regional form.
Client calls, supplier negotiations, team stand-ups in São Paulo, Lisbon, or Luanda. Portuguese-medium business runs across time zones on voice calls, with decisions made at professional speed.
SNS24 health line (Portugal), hospital callbacks, UPA phone triage (Brazil), pharmacy queries. Healthcare in Brazil and Portugal operates heavily by phone — missing a medication instruction or appointment time has direct consequences.
Bradesco or Itaú IVR menus (Brazil), EDP or NOS customer lines (Portugal), Vodafone Portugal automated systems. Portuguese-language customer service is phone-first, with automated systems that move at full speed.
A Brazilian calling a colleague in Portugal, or vice versa. The accent gap between Carioca Portuguese and Lisbon Portuguese on a phone call is one of the most extreme within a single language.
WhatsApp Video with family across Brazil and Portugal, Zoom for remote work. Even with video on, following fast conversational Portuguese across variety boundaries is exhausting. Captions remove that cognitive load entirely.
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 Portuguese is hard to understand
European vowel reduction
- European Portuguese reduces unstressed vowels nearly to zero
- Lisbon Portuguese systematically reduces unstressed vowels to near-silence: 'professor' sounds closer to 'prfssor', 'Lisboa' to 'Lisbû'. On a phone call, these deletions mean words sound dramatically shorter than expected. A deaf caller calibrated to Brazilian Portuguese — with its full vowels — faces a near-incomprehensible signal on a call from Portugal.
Brazil-Portugal rhythm
- Brazilian and European Portuguese have different timing systems
- Brazilian Portuguese is syllable-timed — vowels are given equal weight. European Portuguese is stress-timed — unstressed syllables collapse. The rhythmic difference is so marked that even hearing speakers sometimes struggle across varieties. On a phone call, the prosodic mismatch makes word boundary detection harder for a deaf listener.
Carioca speed
- Rio de Janeiro Portuguese is among the fastest spoken
- Carioca Portuguese (Rio) is characterised by open vowels, fricativized palatals (/tj/ → /tʃ/), and fast pitch movement. On a phone call from a Rio family member, the density of signal is extreme — and the acoustic features are different from any standard variety taught in speech therapy contexts.
Nasal vowels and diphthongs
- Portuguese nasal sounds carry a heavy information load
- Portuguese has five nasal vowels and several nasal diphthongs. Nasal quality is entirely acoustic — no visible lip movement signals it. Phone compression reduces nasal quality, making nasal/oral minimal pairs harder to distinguish. In Brazilian Portuguese, nasal diphthongs (/ãw̃/, /ẽj̃/) carry significant morphological information.
Final verb deletion
- Informal speech drops verb-final /r/ across Brazil and Portugal
- In casual spoken Portuguese, infinitive verb endings drop the final /r/: 'falar' becomes 'falá', 'comer' becomes 'comê'. These deletions are morphologically significant — they change the grammatical signal. On phone calls, they happen in every informal register and are masked by compression.
Download for free
Download on theApp StoreTen million deaf and hearing-impaired people in Brazil
Brazil's census identifies approximately 10 million people as deaf or hard of hearing — about 5% of the population, making hearing loss the third most prevalent self-reported disability in the country. A study in the city of Juiz de Fora (PMC, 2022) found disabling hearing loss prevalence of 22% among adults, rising sharply with age. The Northeast region, one of Brazil's poorest, shows hearing loss rates above the national average. In Portugal, more than 10% of the population lives with a disability, with hearing loss the most common single sensory disability.
Brazil's Lei Brasileira de Inclusão (Law 13.146, 2015) mandated accessibility for people with disabilities, including telecommunications access. However, a 2024 Human Rights Watch report found that implementation remains deeply inconsistent — many digital services are still inaccessible, and the government's new disability plan leaves significant gaps. Brazil's telephone relay service for deaf users operates limited hours and serves a small fraction of the estimated need. Portugal has no equivalent national relay service for deaf callers. Research published in SciELO Brazil found that deaf Brazilians face significant barriers accessing healthcare precisely because of phone-dependent booking and results systems.
Captio AI is built for those calls. Put an SNS24 call, a Bradesco customer service menu, or a WhatsApp call from family in Salvador on speaker, and read every word in real time.
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
"Work calls with colleagues in Porto Alegre and Recife — same language, completely different speed and accent. I missed most of it and reconstructed from email. Captio AI gives me every word in real time. I participate in those calls now."
"SNS24 calls are fast European Portuguese with medical vocabulary. I used to ask my wife to make those calls for me. Now I put it on speaker and read every word as the nurse speaks."
"Carioca Portuguese on a phone call is already the hardest thing to follow — fast, open vowels, fricativized consonants. Add phone compression and it's almost impossible. Captio AI gets every word right."
"My bank's automated menu in Portuguese runs through options at full speed. I'd given up on those calls. Now I put Captio AI on speaker, read each option as it's said, and sort things myself without going into a branch."
"Work calls with colleagues in Porto Alegre and Recife — same language, completely different speed and accent. I missed most of it and reconstructed from email. Captio AI gives me every word in real time. I participate in those calls now."
"SNS24 calls are fast European Portuguese with medical vocabulary. I used to ask my wife to make those calls for me. Now I put it on speaker and read every word as the nurse speaks."
"Carioca Portuguese on a phone call is already the hardest thing to follow — fast, open vowels, fricativized consonants. Add phone compression and it's almost impossible. Captio AI gets every word right."
"My bank's automated menu in Portuguese runs through options at full speed. I'd given up on those calls. Now I put Captio AI on speaker, read each option as it's said, and sort things myself without going into a branch."
Download for free
Download on theApp StoreFrequently asked questions
Follow every call in Portuguese.
Captio AI is free to start
coming soon
Download for free
Download on theApp Store