Captio AI
🦻 Accessibility + 💻 Productivity App

Swahili live captions and productivity tool for tv & media

For deaf and hard of hearing people.

Download for free

Download on theApp Store
Captio AI app showing live captions

Download for free

Download on theApp Store
Use Cases

Every situation covered

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

📺Live TV — news, sport, events

Citizen TV, KBC, and TBC run live news that pre-generated captions cannot keep up with. Point Captio AI at your TV and read the Swahili as it is spoken, not several seconds behind the anchor.

🎬Streaming content

Showmax and other platforms vary in subtitle quality and availability. Captio AI works as a consistent fallback for any Swahili show or film that ships with wrong, delayed, or missing captions.

📱YouTube and social media

YouTube auto-captions for Swahili are often inaccurate and most social video has none. Point Captio AI at your phone and read accurate Swahili captions for any clip.

🌍Foreign-language content

A foreign film, a foreign documentary, a non-Swahili channel. Live Translator captions and translates in real time so anything becomes watchable in Swahili as it plays.

🎭Cinema

Not every cinema showing is captioned. Hold Captio AI near the audio and read real-time Swahili captions of the dialogue discreetly from your seat.

🎧Podcasts and audio content

Most Swahili podcasts have no transcript. Hold Captio AI near the audio or upload a recording, and read the whole episode in writing.

Performance

Most accurate and fastest models

Swahili
90.7%

word accuracy

independent benchmark, 2025

< 200ms
you speak
captions

real-time captions

first word appears as you speak

Download for free

Download on theApp Store
Captio AI in everyday use
Why Captio AI

Built for the content that subtitles fail

Captions any content in real time

Point the phone toward any speaker — TV, laptop, tablet, cinema screen. Captio AI captions whatever is playing, regardless of whether that platform provides subtitles.

Faster than built-in subtitles for live content

Pre-generated subtitles lag behind live TV by several seconds. Captio AI captions in real time — so you read what is being said as it is being said.

Works on any screen or device

No integration required. Point the phone toward the audio source — the same approach works for a large TV, a laptop screen, a cinema, or a phone held at arm's length.

Any language, translated in real time

For foreign-language content, switch to Live Translator. It translates as content plays — so a French film, a German documentary, or a Japanese series all become watchable.

No subtitle file needed

Captio AI captions from the audio directly. No subtitle file, no platform support, no creator requirement. If audio plays, Captio AI can caption it.

More accurate than auto-generated captions

The industry average for AI-generated subtitles is a 10–15% word error rate — roughly 1 in 10 words wrong (3Play Media). Captio AI is built for accuracy in real-world audio conditions.

Swahili

Why Swahili is hard to understand

Prenasalized consonants

  • Nasal-plus-stop sounds with almost no lip signal
  • Swahili uses prenasalized consonants — clusters written mb, nd, ng, nj where a nasal glides straight into a stop. The nasal onset happens with little visible lip movement, so on a TV drama or a fast news read a deaf viewer sees the stop but not the nasal that changes the word.

Dialect range on screen

  • Coastal, Tanzanian, and up-country varieties differ
  • Swahili media spans coastal Kiswahili, Tanzanian standard, and the up-country Swahili of Kenya and Uganda. These varieties differ in rhythm and vocabulary, so a deaf viewer re-calibrates with each new show, and the face on a small screen is hard to lip-read anyway.

Noun-class prefixes

  • Grammar riding on the front of every word
  • Swahili marks its many noun classes with prefixes that ripple agreement across a whole sentence. This grammatical information sits on unstressed syllables at the start of words, and when a presenter speaks quickly the prefixes clip and blur on screen.

Swahili–English code-switching

  • English dropped into Swahili content
  • East African TV, film, and YouTube mix Swahili and English constantly. A deaf viewer must switch to English phonology on the key words, then back to Swahili, with no visual warning and no lip to read when the shot cuts away.

Arabic-origin sounds

  • Borrowed consonants in formal vocabulary
  • Formal and news Swahili draws on Arabic loanwords carrying sounds like 'gh' and 'kh' made far back in the mouth. These appear in the elevated language of a news read, and they give a lip-reader little to nothing to work with on screen.

Download for free

Download on theApp Store
The Challenge

East African screens lean on sign-language news — and little else

Hearing loss is a large and rising burden in East Africa: disabling hearing loss across Sub-Saharan Africa is estimated at around 4.55% of the population, and the WHO projects the number of people with hearing loss in Africa could reach 54 million by 2030. The Kenya 2019 census recorded over 150,000 deaf people aged over five, and a large Swahili-speaking population across Kenya, Tanzania, and Uganda shares the same media.

For deaf access, East African broadcasters have focused on sign-language interpreting during television newscasts — welcome, but limited to a small window of programming — while captioning and subtitling remain sparse. Broadcasters tend to prefer subtitles on cost grounds, but little of the schedule carries them; streaming subtitle quality varies, YouTube auto-captions for Swahili are unreliable, and most drama, entertainment, and social content is uncaptioned. Beyond the signed news bulletin, most of what plays on screen is inaccessible from the audio.

Captio AI does not depend on the broadcaster or the platform. Point the phone at any screen — a live Citizen TV bulletin, a Showmax drama, a YouTube clip — and read Swahili captions in real time, in the variety actually being spoken, whether or not that content was ever captioned.

Download for free

Download on theApp Store
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

"There is signed news, but the rest of the schedule has nothing for us, and Swahili mixes in English constantly. Captio AI captions any programme from the audio, in real time. It covers everything the signed bulletin does not."

Juma A. 🇰🇪
juma.a***@gmail.com
Hard of hearing, Nairobi — live news viewer

"Coastal Tanzanian Swahili is different from Kenyan Swahili, and streaming captions barely exist. Captio AI captions the actual dialogue from the audio, whatever the variety. I follow the whole show now."

Neema M. 🇹🇿
neema.m***@gmail.com
Deaf, Dar es Salaam — streaming viewer

"Swahili YouTube auto-captions are unreliable and the prenasalized sounds are invisible on the lips anyway. Captio AI captions any clip accurately from the audio. It changed how much I can watch."

Otieno K. 🇰🇪
otieno.k***@gmail.com
Hard of hearing, Kisumu — YouTube viewer

"East African dramas rarely have captions. Captio AI captions the dialogue from the audio in real time. For the first time I follow the shows my family watches together."

Amina H. 🇹🇿
amina.h***@gmail.com
Deaf, Arusha — drama viewer

"There is signed news, but the rest of the schedule has nothing for us, and Swahili mixes in English constantly. Captio AI captions any programme from the audio, in real time. It covers everything the signed bulletin does not."

Juma A. 🇰🇪
juma.a***@gmail.com
Hard of hearing, Nairobi — live news viewer

"Coastal Tanzanian Swahili is different from Kenyan Swahili, and streaming captions barely exist. Captio AI captions the actual dialogue from the audio, whatever the variety. I follow the whole show now."

Neema M. 🇹🇿
neema.m***@gmail.com
Deaf, Dar es Salaam — streaming viewer

"Swahili YouTube auto-captions are unreliable and the prenasalized sounds are invisible on the lips anyway. Captio AI captions any clip accurately from the audio. It changed how much I can watch."

Otieno K. 🇰🇪
otieno.k***@gmail.com
Hard of hearing, Kisumu — YouTube viewer

"East African dramas rarely have captions. Captio AI captions the dialogue from the audio in real time. For the first time I follow the shows my family watches together."

Amina H. 🇹🇿
amina.h***@gmail.com
Deaf, Arusha — drama viewer

Download for free

Download on theApp Store
FAQ

Frequently asked questions

Watch anything in Swahili.

Captio AI is free to start

Download for free

Download on theApp Store