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A meetup in Chiang Mai seen from the back of the room: the speaker at a lectern, a screen reading Building for Southeast Asia with live captions in English and Thai, and rows of people whose phones light up in red as the captions reach them.

Live translation for talks, meetups and events

Every talk, in every language.

Live captions, questions and polls on every phone in the room, each in its own language. Your Mac or iPhone listens and translates on-device; the audience scans one QR.

Get Pro — $30 lifetimeDownload free

One payment. No subscription. No account. macOS 26 on Apple Silicon. iPhone and iPad app on iOS 26.

Speech locales
54
Audio to cloud
0 B
Phones, one QR
200
Servers to rent
00

IChapter I · 19:00 · Nimman, Chiang Mai

The room

Almost every night there's a talk in English. The visitors sit up front. The people who live here, who know the city best, sit at the back, if they come at all.

Then the captions arrive, and every phone in the room follows the talk in its own language.

ENTHESZHJACS

IIChapter II · Q&A open

The question

From the back row, someone types in Thai. On the screen it reads in English, and nobody had to stand up and be brave in a second language.

THENAsked in Thai, on stage in English

IIIChapter III · After the applause

The meeting

The people who liked that question find each other afterwards, with an icebreaker each in their own language. The knowledge stays in the city.

THENWave, accept, meet

EN
Tonight is about building products for Southeast Asia. Six hundred and eighty million people, eleven countries. So rule number one: design for the phone in someone's pocket. Rule two: assume the network will drop, and make that feel normal.
TH
คืนนี้เราจะคุยกันเรื่องการสร้างผลิตภัณฑ์สำหรับเอเชียตะวันออกเฉียงใต้ ผู้คนหกร้อยแปดสิบล้านคน สิบเอ็ดประเทศ กฎข้อแรก: ออกแบบสำหรับโทรศัพท์ในกระเป๋าของทุกคน กฎข้อสอง: คิดไว้เลยว่าเน็ตจะหลุด
ES
Esta noche hablamos de crear productos para el Sudeste Asiático. Seiscientos ochenta millones de personas, once países. Regla número uno: diseña para el teléfono en el bolsillo. Regla dos: asume que la red se caerá.
01Origin18.7883° N · 98.9853° E

Chiang Mai has a meetup almost every night, and almost all of it in English. The people with the most to share are the least likely to be in the room.

Visitors come, spend money and move on, and what they know leaves with them. The long-term win is knowledge exchange: skills, networks and ideas flowing both ways, in both languages, and staying in the city after the visitors go.

JoinInter turns passing through into passing on.

02Three barriersEach harder than the last

Most translation tools stop at the first barrier. We go through all three.

  1. Understanding

    Following the talk

    A fast talk in a second language is hard to keep up with.

    The speaker's Mac or iPhone transcribes and translates on-device. Captions stream to every phone in the viewer's language, with the original one tap away.

  2. Asking

    Asking a question

    Even when you follow, speaking up in English in front of a room is intimidating.

    Ask in Thai and the speaker reads it in English. Everyone else sees it in their own language. Ask anonymously if you like; the room likes the best questions up.

  3. Approaching

    Approaching someone

    Walking up to a stranger afterwards is harder still.

    Meet the people who liked your question. Wave, they accept, and only then do you see each other's name, how to spot them and a contact, with icebreakers in your own language.

How an evening goes

  1. S.1

    Go live on your Mac

    Pick your language and the room's languages, then press Go live. The relay starts inside the app; there's no server to rent.

  2. S.2

    Phones scan the QR

    Attendees scan one code and pick a language. No app to install, no account, nothing to sign.

  3. S.3

    Captions in your language

    Every phone follows the talk in its own language, live sentence by sentence or as a running transcript.

  4. S.4

    Ask in your language

    Questions arrive in the speaker's language, and the room reads them in theirs. Pin the best one on stage with a click.

  5. S.5

    Meet

    After the talk, wave at people who liked your question. Matches get icebreakers grounded in the talk, each in their own language.

03The appPresenter · Mac & iPhone

One voice. Every
language.

JoinInter turns a talk into a multilingual room. Your Mac transcribes and translates on-device. The room scans a QR, reads live captions in its own language, asks in its own language, votes, and meets.

Get Pro — $30 lifetime Download free

One payment. No subscription. No account. Key verifies offline.

Speech locales
54
Audio sent to cloud
0 B
Phones tested
200
Servers to rent
00
FIG. 1Control room, live

Comprehensive themes. Fit to your style.

The same live Control room in each of the app's four styles. Switch any time in Settings › Appearance; the stage, the attendee pages and your exports follow.

04Features9 modules · 1 signed app

Everything a multilingual room needs. A Slido alternative with translation, running on the devices you already brought.

F.01Free + Pro

Live captions and translation, on-device

Speech recognition and translation run on the presenter's Mac or iPhone. Audio never leaves the room; the relay only ever sees text.

54 speech locales · NLLB-200 for Burmese, Lao, Khmer, Shan

F.02Pro

A multilingual Q&A that the room actually uses

Attendees ask at any time in their own language. You open a Q&A segment when you're ready, and that's when questions go on stage and reactions unlock.

3→1 same question, all likes kept

F.03Pro

Polls the quiet half of the room will answer

The quietest attendees, often locals following in a second language, will tap a button long before they raise a hand.

⌃⌥⌘P quick poll mid-talk

F.04Pro

A stage canvas for every screen in the room

Prepare the show the day before: slides, captions strip, QR corner, Q&A rail, poll widget and sponsor strip, laid out as zones on a 16:9 stage.

16:9 any output resolution

F.05Pro

Send the stage to OBS, Zoom or a whole broadcast

JoinInter is a source, not another streaming app. OBS does the encoding; you get captions, questions and polls as clean video.

3 outputs · program audio rides along

F.06Pro

No laptop? The whole event fits in your pocket

Standalone mode runs a complete session from an iPhone or iPad: yoga classes, walking tours, monk trails, small meetups. Companion mode pairs phones with your Mac.

0 laptops required

F.07Pro

A proper record of the evening

Everyone leaves with a one-page recap in their own language, by email if they ask for it. You keep the complete, timestamped record.

JSON · CSV · PDF · MD

F.08Free + Pro

The part after the applause

Questions connect people. Wave at someone who liked your question; once they accept, you both see how to spot each other.

0 API keys needed

05Stage canvasOutput 1 · 1920 × 1080

One composed stage. Slides, captions, timer, the pinned question, the poll and the QR, laid out as zones.

  1. Z1Slide areaPDF, Keynote, PowerPoint or window capture
  2. Z2Caption stripUp to three room languages, live
  3. Z3QR cornerJoin code, always visible
  4. Z4Pinned questionAsked in Thai, shown in English, 8 s rule
  5. Z5TimerSection, ahead or behind, amber then red
  6. Z6Sponsor stripSeries branding from the Library
RULEwhen a question is pinned → open the side rail for 8 s
RULEon slide 12 → open poll "Tooling?" → results in Z1
RULEon the last slide → show QR + Meet

Outputs

  • Projector
  • Control window
  • Recording
  • OBS browser source
  • Virtual camera
  • NDI
06FilmsReal app output · Mac, iPhone, iPad

See it run. Real app output from a Mac, the stage and the phones in the room, cut into short films.

Go live, start to finish

Prepare once, go live, the room joins with one QR, captions in every language, a Thai question pops up in English, a poll, the Q&A wall and the end screen. Real app output, 50 seconds.

Go live, in 22 seconds

The short cut: one QR, captions in every language, a Thai question on stage in English. Real app output.

The launch film

One room, every language: phones join with a QR, captions in Thai, Spanish and Chinese, a Thai question lands on stage, a live poll, and one show on every output.

iPhone and iPad standalone

A whole session from an iPad over its own hotspot: phones join, a Thai question lands, the stage goes to HDMI.

iPhone and iPad standalone, in 16 seconds

No Mac, no Wi-Fi: the iPad hosts the room over its own hotspot, phones join, a Thai question lands, the stage goes to HDMI. Real app output.
07PrivacyOn-device by design

Audio never leaves the room. On-device by design, not by setting. Read the privacy notes.

  • P.01

    Audio stays on the device

    Speech recognition and translation run on the presenter's Mac or iPhone. No recording is uploaded, ever.

  • P.02

    The relay forgets

    The relay only carries text, keeps rooms in memory and forgets them after 12 hours idle.

  • P.03

    Attendees stay anonymous

    A random device ID, no account and anonymous questions. Contact details go only to accepted matches.

  • P.04

    This site asks first

    Analytics and ad measurement load only after you opt in. Change your mind any time under Cookie settings.

08PricingIf it costs us nothing to run, it's in Pro

Free to start. Pay once for the show.

Free runs your talk on your own Mac: captions, translation, a public link and Q&A, with no key and no account. Pro adds polls, Q&A 2.0, the stage, stream output and recaps for $30, once, with every 1.x update. Hosted is for the parts that need our servers.

Get Pro — $30 lifetime
T.0

Free

Freeno key, no account, no server of ours

Your talk, captioned and translated, with phones joining your own Mac from anywhere.

  • On-device captions and translation
  • Phones join this Mac over Wi-Fi, a hotspot or offline
  • Free public link from anywhere (quick tunnel, nothing to install)
  • Q&A: attendees ask in their language, you answer
  • Meet: matching and icebreakers, timer and alerts
  • iPhone and iPad host on Wi-Fi or a hotspot
Download free
T.1

Pro

Recommended

$30once, lifetime (all 1.x updates)

Everything in Free, plus the show: polls, the full Q&A, the stage, your stream and a recap afterwards.

  • Live polls and word clouds
  • Q&A 2.0: moderation, threads, merges, themes, reactions
  • Stage canvas, multi-screen and recording
  • OBS output: browser source, virtual camera, NDI
  • Recaps for attendees and the recap by email
  • Branded <meetup>.joininter.link
Get Pro — $30 lifetime
T.2

Hosted

Soon

Waitlistper event or monthly, opening soon

Pro plus the parts that need our servers.

  • Registration and check-in with QR tickets
  • Post-talk chat that outlives the laptop
  • Hosted recaps and branded recap email
  • Cloud sync, team sharing, bigger audiences
Join the waitlist
T.3

Enterprise

Contactcontract

Conferences, venues and broadcast crews.

  • External speech and translation providers
  • Multichannel audio and interpreters
  • Distributed nodes and a relay cluster
  • SSO, DPA, on-prem and support
Talk to us
Free vs Pro, row by row
FeatureFreePro · $30 once
On-device captions and translationIncludedIncluded
Phones join this Mac: Wi-Fi, hotspot, works offlineIncludedIncluded
Public link from anywhere (quick tunnel, nothing to install)IncludedIncluded
Q&A: ask in any language, likes, you answerIncludedIncluded
Meet: matching and icebreakersIncludedIncluded
Your own relayIncludedIncluded
iPhone and iPad host on Wi-Fi or a hotspotIncludedIncluded
Live polls and word cloudsNot includedIncluded
Q&A 2.0: moderation, threads, merges, AI themes, reactionsNot includedIncluded
Stage shows and canvas on a second screen, recordingNot includedIncluded
Stream output: browser source, virtual camera, NDINot includedIncluded
Recaps for attendees and the recap by emailNot includedIncluded
Branded <meetup>.joininter.linkNot includedIncluded

T.2Hosted waitlist

Be first when Hosted opens.

Registration and check-in, chats that outlive the laptop, hosted recaps and bigger rooms.

We'll email you when Hosted opens. Nothing else, and you can ask us to forget you any time.

09Questions10 answers

Ten answers before you buy.

Anything else, write to hello@joininter.com. A person in Chiang Mai answers.

Q.01Do attendees need to install an app?

No. Attendees scan a QR code and JoinInter opens in their phone's browser. They pick a language, read along, ask and meet. No account, nothing to install.

Q.02Does audio leave my Mac?

No. Speech recognition and translation run on the presenter's Mac or iPhone. The relay only ever sees text, keeps rooms in memory and forgets them after 12 hours idle.

Q.03Which languages does live translation support?

Speech input covers 54 locales. Apple Translation covers 19 languages (38 with regional variants) on-device, and the Mac adds NLLB-200 for languages Apple lacks, such as Czech, Burmese, Lao and Khmer. The attendee interface is in English, Thai, Chinese, Japanese, Czech, German, Spanish, French and Ukrainian.

Q.04What's free, and what does the $30 lifetime license add?

JoinInter Free needs no key: on-device captions and translation, phones joining your Mac over Wi-Fi, a hotspot or a free public link, and Q&A where attendees ask and you answer. Pro adds polls, Q&A 2.0, the stage, stream output, recaps and a branded link, in the same signed app, with all 1.x updates. It's a one-time purchase with no subscription and no account. The key verifies offline, so it works at events with no internet.

Q.05Is JoinInter a Slido alternative?

For in-room events, yes, and it translates. Slido-style tools assume everyone speaks the language of the talk. JoinInter translates captions, questions, replies and polls for every attendee, runs on-device, and has no per-event fees.

Q.06Does it work without internet?

Yes. Run the relay over the venue Wi-Fi or a phone hotspot and everything except the public link works offline: captions, translation, Q&A, polls and Meet.

Q.07How many attendees can join?

The built-in relay handles a full meetup room; we test 200 phones at once. The one-click public link has a cap of about 200 connections. Larger audiences are what Hosted and Enterprise are for.

Q.08Can I use it with OBS or a livestream?

Yes. JoinInter outputs a browser source, a virtual camera and NDI, either as the full stage or as a transparent overlay of captions, questions and polls. OBS does the encoding and streaming.

Q.09Can I present from just an iPhone?

Yes. Standalone mode runs a whole session from an iPhone or iPad over its own hotspot. AI icebreakers and the extended NLLB languages need a Mac; on iPhone, rooms use localized template icebreakers and Apple's languages.

Q.10What happens to attendees' data?

Attendees get a random device ID and can stay nameless. Anonymous questions stay anonymous, even to the speaker, until both people accept a wave. Contact details are shared only with accepted matches, and you choose how long each event keeps its data.

Melt the language barrier. Break the ice.

Get Pro — $30 lifetimeDownload free

macOS 26 on Apple Silicon. iPhone and iPad app on iOS 26.