Privacy
Last updated: November 10, 2026
SpeakTwin has no accounts and uses no advertising or tracking cookies. What you do here stays in your own browser. This page explains the details and the few outside services involved.
What is stored on your device
Your recordings, progress, saved words, practice settings and any videos you add are stored in your browser, on your device. They are never uploaded to us.
You can delete them on the My practice page or by clearing this site’s data in your browser. Some browsers also clear a site’s stored data by themselves if you do not visit it for a while.
Videos
Videos are shown with YouTube’s embedded player, in its privacy-enhanced mode. The player is provided by YouTube: using it is subject to the YouTube Terms of Service, and the information YouTube receives when a video loads or plays (such as your IP address) is handled under Google’s Privacy Policy.
Lesson pictures are loaded from YouTube’s image servers.
Microphone and word checking
The microphone is used only after you switch on “Record my voice”, and you can switch it off at any time. Recordings stay in your browser.
“Check my words” is optional. In desktop Chrome and Edge it uses the browser’s own speech recognition, which may send your audio to the browser’s maker to be transcribed. In other browsers it downloads a speech model once from Hugging Face, and the code that runs it from the jsDelivr network, and then works entirely on your device.
Your own video links
When you paste a YouTube link, the video’s identifier is sent to our server, which reads that video’s subtitles from YouTube and returns them. The result is cached; it is not linked to you.
Hosting
The site is hosted by Cloudflare, which processes technical data such as IP addresses to deliver pages and protect the service. We do not run advertising or analytics that follow you across sites.
Links to other sites
Dictionary links and “Watch the original” open other websites, which have their own privacy policies.
Contact
Questions about privacy, or a request to remove a video: hello@speaktwin.com.