What was just said, in large type.
Lo que se acaba de decir, en grande.
Your calls stay on your computer. Terpside listens to the call playing in your headphones, splits it into turns and shows you each one transcribed in its language with the translation underneath. Recognition and translation run on your PC: no account, no cloud, and nothing from your calls leaves it.
This is the actual product interface with a made-up call.
- Audio output only: the microphone is never opened
- Recognition and translation on your computer, no internet
- Free Pro trial: up to 2 hours a day for 5 days. Pro: unlimited hours
Download it free
From the Microsoft Store it installs without Windows warnings and updates itself. Free for 60 minutes a day, no account or card, plus a 5-day Pro trial.
How it works
Three steps, in this order, on your computer.
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Listen to the output
Terpside captures only what plays through your headphones from the app you choose (Chrome, Zoom, whatever your platform uses). The microphone is not opened; there is no setting to open it.
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Wait for the speaker to finish
Instead of captions that rewrite themselves while people talk, Terpside closes each turn when the person stops and only then transcribes it. If the person keeps dictating (a phone number dictated in three parts), the same bubble is completed; very long turns are split at 15 seconds.
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Use the language to label the speaker and translate
English → provider (blue), Spanish → patient (green). The original appears in large type, with a smaller translation below. When a word has more than one possible translation, the medical glossary flags it; it never rewrites the text.
Provider · enTake one tablet twice a day with food.
Patient · es¿Con comida o antes de comer?
What it does
All features-
Turn-by-turn bubbles, no flickering
Each turn is transcribed when it ends and appears at once; it is only extended if the person keeps dictating. You can scroll back through the whole call.
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Speaker labels based on language
No diarization or voice identification: the detected language determines the speaker label. Blue is the provider, green is the patient; uncertainty is marked with a ?.
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Local translation with the actual processing time
Opus-MT translates each bubble on your PC, and the label shows how long it really took ("local · 180 ms"). There is no cloud button: the public edition does not include that route.
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A glossary that flags terms without changing them
When a word has more than one possible translation (discharge: alta or secreción; shot: inyección or vacuna), a note beside the bubble shows the options. The text stays as it is.
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Capture audio from one app
Choose Chrome, Zoom, or your platform’s app instead of the entire audio output, so a WhatsApp notification does not get transcribed.
Critical Data Guard
ProDoses, frequencies, dates, times, phone numbers and amounts it has just recognized stay pinned for about a minute and a half in a separate strip. It pins what the recognizer understood; it does not validate the audio. It saves you from holding it in memory; it does not replace your ears.
Critical Data Guard
- DOSAGE
- 400 mg
- FREQUENCY
- twice daily
- DATE
- September 24th
- TIME
- 3:30
What you can verify
Terpside has no account and no save button, and nothing it hears leaves your computer. The transcript lives in the program's memory while it is open and is discarded when you close it. The edition that is sold does not include the routes to export text or to send sentences to an external translator; an automated test checks in every release that those routes do not exist.
The program talks to itself over a local port on your computer (that is how the window is drawn). The license is verified with a signature inside the program. It only connects out to renew a paid license when Paddle charges the next period (it sends only the computer code) and, once a day, to read which version is the latest (it sends nothing about the computer); both can be turned off in ⚙ → Privacy. The only things written to disk are your settings, the license and a technical log with no sentences from calls.
- Audio
- Only the chosen output, never the microphone.
- Call text
- In memory, never saved, never sent.
- Models
- Moonshine, Whisper and Opus-MT, included in the installation, no API calls.
I use it every day
Kevin · interpreterI'm Kevin, a Spanish ↔ English medical interpreter from Latin America, with extensive experience interpreting for multiple companies. I work over the phone and by video for clinics and hospitals in the United States, through interpreting agencies: appointments, results, discharge instructions, pharmacy calls. Conversations where a misheard number matters.
For a long time my second monitor was a stack of three tools that were not built for this and got in each other's way. In July 2026 I built what I wanted to have, and I keep refining it with what I know of the trade. Since then I open it when the shift starts and close it when it ends; what it heard goes with it. Terpside is an interpreter's tool, shared with other interpreters.
- July 2026
- in daily use since
- 0
- call data leaving your computer
Resources for interpreters
Practical guides, useful even if you don't use Terpside.
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Tools for medical interpreters
Headsets, notes, glossaries, live captions and how to protect what the patient says.
Read the guide -
English–Spanish medical glossary
Words whose translation depends on context: discharge, shot, stool, claim…
See the glossary -
Transcription without the cloud
What changes between the cloud and your computer, what HHS says and how to check where the audio goes.
Read more -
The best live caption tools
8 tools compared: where they process audio, whether they translate, and what they cost.
See the comparison
Frequently asked questions
Does it listen to my microphone?
It does not open the microphone: it captures only the selected audio output, what plays in your headphones. If that output includes an echo of your voice, it can capture that too.
Does it save the call anywhere?
No. The history is in the program's memory and is discarded when you close it. The edition that is sold includes no function to export or send text off your computer.
Does it need internet access?
No. The speech recognition and translation models are included in the installation, and the license is checked offline. You can use it with the network cable unplugged. Only renewing a paid subscription and the new-version notice use the network, and both can be turned off; without renewal, you paste the new license yourself.
Can I use it with my agency?
Terpside is a visual aid that runs on your computer and does not record or save anything. Still, each agency has its own policy on captioning and note-taking tools. Check yours first.
Is Terpside HIPAA compliant?
HIPAA does not certify software: it applies to clinics, hospitals and insurers, and to those who work for them, such as agencies and their interpreters. Terpside does not receive, store or send patient information: everything is processed on your computer and discarded when you close it, so it does not act as a business associate and no BAA with Terpside is needed. Use depends on the individual or the agency: if you work on your own, you decide based on your contracts; if you work through an agency, check its policy first. To do your part, keep your disk encrypted (BitLocker or Windows Device Encryption), lock your session when you step away and do not share your screen with call data in view.
Can the interpreting platform or my agency detect it?
Terpside is a separate program on your computer: it does not connect to the platform, install anything inside it or send it anything; it only reads the audio output through standard Windows capture. It is not built to hide: its window stays on top of the others (you can turn that off in ⚙), so it shows if you share your screen, and monitoring software your agency uses can see which programs you have open. It has not been tested with every interpreting platform. Before using it, confirm that your agency allows it.
Are there other languages besides Spanish and English?
For now, Spanish ↔ English only. If you need another language pair, ask for it on the Support page or at soporte@terpside.app, so we know which ones are needed first.
Does it work on a Mac or in the browser?
Yes, as a Chrome extension: it listens to the call's tab and recognizes and translates on your computer, just like the Windows app. It works if your call platform runs in the browser. Install it from the Chrome Web Store: https://chromewebstore.google.com/detail/terpside/ejglbafecikncglgkihfdhmdeohpalnj
What happens when the trial ends?
Terpside switches to the Free plan: everything except Critical Data Guard, with 60 minutes of use a day that reset at midnight, using your computer's local time. The session history stays in memory until you close the app. Pro removes the limit.
Try it free for 5 days
Pro trial: up to 2 hours a day for 5 days, with a voucher you request on the website, no account or card. After that it stays on Free with 60 minutes a day, or move to Pro: unlimited hours for 19.90 USD a month, or 13.93 USD with the founder price for the first 20 people.
Can't try it right now?
Leave your email and we will write when a new version is out or there is an offer, like the founder price. Only for that, a few times a month at most, and you can unsubscribe by replying “unsubscribe”.
If the form does not work, email soporte@terpside.app