Live interpretation captions for churches, seminars and events
On the stage screen,
and on every phone
AI puts captions on the stage screen and on every guest's phone within 2 seconds of the first word, in 82 languages.
No earpieces, no receivers, no app to install.
For in-person events only · no cap on how many guests join
3 hours free every month· up to 30 min a day · no credit card
82 languages
two-way, real time
1,000
concurrent guests, verified
No install
browser only · one QR
In-person
physical rooms · not video calls
Built for church services and seminars
With Worship Mode, it speaks the church's language — not generic translation. Theological terms like justification and sanctification stay consistent, and the Lord's Prayer, the Creed, and the benediction appear word-for-word instead of being re-translated by AI.
Setting it up for your church is simple
- 1Open Settings () and turn on Domain preset → “Worship · Church.”
- 2In the same panel, choose your Audio input device.
If you run your church's sound or video booth, you can do this.
One screen up front. That's the setup.
Phone-only services lose the guests who don't use phones well. Headset interpretation means handing out, collecting and charging receivers. We need one laptop and an HDMI cable — no AV operator, no integration software.
| sotonis | Caption app services | Headset interpretation | |
|---|---|---|---|
| Captions on the stage screen | Straight to HDMI | Via ProPresenter / OBS | No |
| Automatic KO↔EN both ways | Yes | Usually one fixed direction | The interpreter decides |
| Captions on guest phones | Yes | App or web | No |
| Earpieces / receivers | None | None | Required |
| What you need | One laptop | Laptop + an AV operator | Interpreter + gear |
Captions are the core, with optional earphone audio too — and still no receivers to hand out or collect.
When the room speaks two languages,
don't run it without sotonis
01
No interpreter, instant
Human interpreters cost $1,000+ a day, and you need one per direction. AI starts within 2 seconds — we tune it with you at a rehearsal 3 days before.
02
Languages can mix
Speakers switch languages mid-session — direction follows automatically, both sides get captions. Any pair of 82 languages; names and terms are pre-registered.
03
One QR does it all
Guests scan a QR — no app. Each phone picks its own language and text size, while the stage screen runs over HDMI.
Enough talk.
Try it right now.
Say anything into your mic. The real operator console opens and your words appear as captions.
3 minutes without signing up.
Sign up and use 3 hours a month, up to 30 min a day.
No card. Runs in your browser. The 3 minutes start when you press Start.
AI reaches
the stage and every phone
Start from the console, and live interpretation goes to the stage screen and every guest's phone at once — with audio, too, through earphones.
One console controls it all
The operator runs language, voice, screen, and glossary from a single console. AI starts translating within 2 seconds.
Captions go to the stage screen
Live captions appear on the stage-side monitors — readable even from the back row.
Guests read on their phones
Scan the QR — no app. Each guest picks text size and translation or original.
Hear it through earphones
Prefer listening? Hear the interpretation as audio. All you need is earphones.
Use a separate PC for AI interpretation. Keeping it apart from the presentation PC keeps interpretation running smoothly.
Every word on stage
They mix languages — everyone still reads along
The opening in one language, a greeting in another, a panel that mixes both — that's a real event. sotonis detects the spoken language and captions the other side automatically. Source and translation appear together — on the stage screen and on every guest's phone.
The screens beside the stage — click to read the captions
Across generations & languages
Every word on stage,
understood by everyone.
A greeting in one language, a keynote in another, a bilingual panel — whichever way the room speaks, the other side gets captions. Second-generation kids and English-speaking guests are never left out. Pick whichever two of the 82 languages fit your event.
Only one screen? Captions on top of your video
No spare screen for captions? Switch the background to video input and the translated captions ride on the bottom of the screen you already project.
- No OBS or broadcast software to wire up.
- Just feed your existing video in over USB with a capture card.
- Put the captions anywhere — drag them where you want.
Pricing
100 guests or 1,000 — the price is the same.
One event
$59and up
Conferences, assemblies, one-off talks
- · From a 1-hour pass to all-day
- · No contract — pay when you need it
Ongoing (subscription)
$47/ mo and up
Churches and schools with weekly services
- · From 6 to 55 hours a month
- · Another 20% off for churches
In Southern California we can come on-site to set up and run it (travel fee applies).
How to use it
From console setup to stage screen and guest phones — follow along on real screens.
Earphone audio, glossary, audio settings — each written up on its own.
FAQ
Do you offer audio interpretation (earphones)?+
Yes, as an option. Guests who find captions hard can plug earphones into their own phone and hear the interpretation. Captions stay the core — no receivers to hand out or collect, and the back row follows the stage screen.
Can it caption online meetings or video audio?+
Yes — it captions audio playing on your laptop (video calls, video clips) onto the stage screen and the phones of people in the room. It's not a video-call integration that distributes captions to each remote participant; sotonis is primarily for in-person events.
Do guests need an app?+
No. They scan a QR and captions open in the phone browser.
How many guests?+
1,000+ read on their own phones at no extra cost.
How good is the interpretation?+
It runs on Google Gemini 3.5 through a real-time API — a translation-native model, so the translation keeps up before a sentence ends. Names, organizations and technical terms are pre-registered before your event and checked at rehearsal with the real speakers.
Can you pre-train it?+
Yes. Upload materials like scripts, papers, or the program, and Gemini reads them to pull out names, organizations, and technical terms — then applies those exact spellings to the interpretation and captions. Even event-specific terms come out right.
What equipment?+
A separate PC for interpretation, your event mic (mixer/USB), an HDMI screen. Keep it apart from the PC running your slides. We set it up together at rehearsal.
What if the internet drops?+
Captions hold their last state and auto-reconnect. For large events we advise a wired + hotspot dual setup.
Refunds?+
Full refund if captions don't show on event day. Single events have no commitment; subscriptions start at three months.
