Captio AI
🦻 Accessibility + 💻 Productivity App

Bosnian live captions and productivity tool for lectures

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.

🏛️Large lecture halls

Large lecture halls at the University of Sarajevo — where foundational courses in law, medicine, and engineering are delivered in standard Bosnian, often in historic buildings with challenging acoustics.

🔬Seminars and tutorials

Seminars and debate sessions at Sarajevo, Tuzla, or Mostar universities — small group discussions where students present in Bosnian and debate quickly, with overlapping speech and informal register shifts.

💻Online and recorded lectures

Online lectures on Bosnian university platforms — digital content where acoustic signal is the only channel and Ijekavian Bosnian is delivered without the visual context of a live lecture room.

📚Study groups

Study group sessions in Bosnian student accommodation — peer discussion in conversational Bosnian, faster and more contracted than formal lecture language, in Sarajevo's student district.

🌍Foreign-language and international courses

International and EU-funded programme lectures at Bosnian institutions — where EU officials or foreign academics deliver presentations in Bosnian with non-standard accents.

🎤Guest speakers and public talks

Guest speakers and public lectures at Bosnian cultural institutions — researchers, politicians, and public figures giving talks in Bosnian on specialist topics, often recorded and broadcast on national platforms.

Performance

Most accurate and fastest models

Bosnian
93.4%

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 pace and pressure of a real lecture

Follow without splitting your attention

Lip-reading and note-taking at the same time is an impossible cognitive load. Captio AI handles the following so you can direct all your attention to understanding what is being said.

Captions while the lecturer is still speaking

Words appear on your screen as they are said — not after the sentence ends. You stay in sync with the lecture rather than always being a beat behind.

Works in any lecture setting

Lecture halls, seminar rooms, online classes, study groups. Place the phone on your desk, point it toward the audio source, and Captio AI handles the rest.

A full transcript to study from

Record the lecture and upload it to Audio Transcription after class. Get a complete written record you can search, annotate, and revise from — at your own pace.

60+ languages

For international students, students studying abroad, or courses taught in a second language. Captio AI captions or translates in real time with no manual setup.

No advance notice needed

Official university captioning requires booking in advance and is not available for every session. Captio AI works for any lecture, any time, with no prior arrangement.

Bosnian

Why Bosnian is hard to understand

Pitch accent system

  • Four pitch accents distinguish word meaning — all invisible on the lips
  • Standard Bosnian has a four-way pitch accent system — short rising, long rising, short falling, and long falling — where identical lip shapes map to different words depending on tonal contour and vowel length. In a Sarajevo lecture hall, a deaf student sees the same mouth shape for words with unrelated meanings, with no visual signal of which pitch pattern the lecturer is using.

Ijekavian yat reflex

  • The Ijekavian ije/je reflex adds syllables a lip-reader doesn't expect
  • Bosnian uses the Ijekavian reflex of the historical Slavic vowel jat — 'milk' is mlijeko (three syllables), not mleko (two). The ij cluster involves a glide /j/ produced very briefly, with minimal lip movement. A deaf student calibrated to Ekavian Serbian sees additional syllables where their visual schema expects one, breaking word recognition at speed.

h preservation

  • Bosnian preserves /h/ in words where other South Slavic varieties drop it — adding an invisible fricative
  • Bosnian retains the /h/ phoneme in many contexts where Serbian tends to drop it — hljeb, kahva, mahala. The /h/ is a glottal or pharyngeal fricative produced at the back of the throat with no visible lip or jaw movement. A lip-reader sees the /h/ as silence, merging it visually with the following vowel and making word-initial parsing harder.

Palatal digraphs

  • The digraphs lj and nj are palatal consonants produced with little visible articulation
  • Bosnian has palatal lateral /ʎ/ (lj) and palatal nasal /ɲ/ (nj) — sounds produced at the hard palate with the tongue blade raised. The lip shape is similar to plain /l/ and /n/ respectively, giving a deaf student almost no visual distinction between palatalized and non-palatalized versions in words like ljubav, njega, or pitanje.

Urban Sarajevo speed

  • Fast Sarajevo academic speech reduces syllables beyond the formal written standard
  • Academic Bosnian in Sarajevo is delivered at a pace that significantly outstrips formal prose, and younger lecturers use an urban register that contracts function words, reduces unstressed vowels, and compresses consonant clusters. A deaf student who has calibrated to formal Bosnian encounters a phonetically reduced form on the lecturer's lips that only partly matches the written word they expect.

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The Challenge

80,000 people with hearing impairments in Bosnia and Herzegovina — and only 14 certified sign language interpreters for the entire country

There are an estimated 80,000 people with hearing impairments in Bosnia and Herzegovina, yet the country has only 14 certified sign language interpreters — roughly one interpreter for every 5,700 people with hearing loss. The Law on the Use of Sign Language in Bosnia and Herzegovina (2009) formally recognised sign language rights for deaf citizens, establishing that interpreters must be provided for dealings with government bodies and that television broadcasts must be translated into sign language. Despite this legal recognition, implementation has been severely constrained by the absence of trained interpreters.

Sign language is not systematically used in education in Bosnia and Herzegovina. Children who are mainstreamed into hearing schools often receive no sign language interpreter support, and as a result many deaf children are delayed in language development, struggle to acquire curriculum knowledge, and experience social isolation within school environments. The 2009 law established a Commission for Sign Language and mandated interpreter registration, but the supply of registered interpreters has not grown to meet the scale of need — and academic sign language interpretation for university-level content is essentially unavailable.

An estimated 3.3% of the general population of Bosnia and Herzegovina has significant hearing loss, though researchers note that the lack of systematic data collection makes this figure uncertain. For a deaf student at the University of Sarajevo navigating lectures delivered in Ijekavian Bosnian with its four-way pitch accent and h-preserving phonology, Captio AI provides real-time captions in Bosnian — making the lecture hall as accessible as the country's law promises but its 14 interpreters cannot deliver.

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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

"There are 14 interpreters in the entire country. My faculty has zero. Captio AI is the only way I follow Bosnian lectures. Four pitch accents — invisible to me, captured by the app."

Amina H. 🇧🇦
amina.h***@gmail.com
Deaf since birth, University of Sarajevo

"Bosnian h — hladnoća, hljeb, hodati — you can't see it on the lips at all. I was guessing at word starts. Captio AI shows every word in full. Tuzla lectures are the first I've properly followed."

Edin M. 🇧🇦
edin.m***@gmail.com
Hard of hearing, Tuzla University

"Ijekavian mlijeko, dijete, bijela — extra syllables I wasn't expecting from lip-reading. Captio AI captions the whole word correctly. My Mostar course is now fully accessible."

Lejla K. 🇧🇦
lejla.k***@gmail.com
Progressive hearing loss, Mostar

"Fast Sarajevo academic speech at engineering pace — completely impossible to lip-read. Captio AI keeps up. I now sit anywhere in the lecture hall instead of the front row."

Adnan B. 🇧🇦
adnan.b***@gmail.com
Hard of hearing, Sarajevo, engineering faculty

"There are 14 interpreters in the entire country. My faculty has zero. Captio AI is the only way I follow Bosnian lectures. Four pitch accents — invisible to me, captured by the app."

Amina H. 🇧🇦
amina.h***@gmail.com
Deaf since birth, University of Sarajevo

"Bosnian h — hladnoća, hljeb, hodati — you can't see it on the lips at all. I was guessing at word starts. Captio AI shows every word in full. Tuzla lectures are the first I've properly followed."

Edin M. 🇧🇦
edin.m***@gmail.com
Hard of hearing, Tuzla University

"Ijekavian mlijeko, dijete, bijela — extra syllables I wasn't expecting from lip-reading. Captio AI captions the whole word correctly. My Mostar course is now fully accessible."

Lejla K. 🇧🇦
lejla.k***@gmail.com
Progressive hearing loss, Mostar

"Fast Sarajevo academic speech at engineering pace — completely impossible to lip-read. Captio AI keeps up. I now sit anywhere in the lecture hall instead of the front row."

Adnan B. 🇧🇦
adnan.b***@gmail.com
Hard of hearing, Sarajevo, engineering faculty

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FAQ

Frequently asked questions

Follow every lecture in Bosnian.

Captio AI is free to start

Download for free

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