StreamTranslateStreamTranslate’s supported phone workflow supplies speech from a streaming app or receiving OBS to a caption output. It is not a released native mobile cross-app translator or floating phone overlay. For personal desktop tab audio, use the separate Elite Watch Party route.
Identify the mobile task before installing an app
| Task | Audio source | What to verify |
|---|---|---|
| Conversation or lecture beside you | The phone’s microphone. | Distance, speaker overlap and local display. |
| Content playing in another app | Application or system playback. | Operating-system capture permission and restrictions. |
| Your own IRL broadcast | The streaming app’s speech feed. | Extra output and audience caption delivery. |
The TransGull listing describes several mobile translation categories, including conversation and floating-subtitle features. Treat them as that developer’s claims and test the exact device and content you need. Their presence in a listing does not establish equivalent StreamTranslate mobile functionality.
For your own phone stream, connect a supported feed
Open the IRL Hub and choose the streaming app or receiver you actually use. Keep your normal video destination enabled. Add the documented StreamTranslate audio or RTMP connection; do not replace Twitch’s video destination with the caption-service URL.
Moblin uses an additional destination. Larix can send a separate audio-only connection while retaining video and audio to Twitch. Other supported apps have their own plan and output requirements. A receiving home or cloud OBS can instead use the StreamTranslate audio filter on the incoming phone feed. Follow the app-specific guide rather than assuming a generic URL field or overlay widget captures your microphone.
Choose where the audience reads the words
- Select the correct spoken language and confirm the phone feed reaches StreamTranslate.
- For Twitch viewer choice, install, activate and link the channel extension.
- For text rendered into the broadcast, use a supported browser-overlay option in the streaming app or receiving OBS.
- Choose the overlay’s language and placement deliberately.
- Check the live output on a second device before relying on it outdoors.
Captions displayed by a phone’s accessibility feature are not automatically transmitted to viewers. Likewise, a web overlay displays text but does not supply its speech input. If both an overlay and extension are enabled, check for overlapping caption layers.
Rehearse battery, data and recovery realistically
Test the same headset or external microphone, screen orientation and mobile connection you will use outside. Check the stream after a brief change in connectivity and confirm which app controls stop the extra caption feed. Additional audio/video output can use mobile data and upload capacity; the cost depends on the chosen route rather than the word captions.
If your actual goal is privately understanding another phone app, this broadcast setup is not a substitute for a compatible mobile translation app. Review that app’s capture permissions, data handling and supported content before use. For permitted media in a desktop browser, Watch Party offers a different, documented tab-audio path. Keep these alternatives clearly separated so installation does not lead to a workflow the device cannot support.
Quick answers
Can StreamTranslate float captions over every phone app?
That is not a supported released capability described here. StreamTranslate’s IRL route sends your broadcast speech to supported audience outputs; desktop Watch Party is a separate feature.
Will my phone’s local captions appear in my stream?
Do not assume so. Local accessibility text and transmitted video are different outputs. Check the actual broadcast from another device and configure a supported audience caption route.
Do I need OBS for every phone setup?
No. Some documented apps can send the required extra feed directly. Other routes, including particular home or cloud receiving setups, do require OBS. Follow the specific IRL guide.
Continue with your setup
Sources and further reading
Reviewed October 28, 2026. Follow the linked provider instructions for current availability and setup requirements.