Privacy Policy
Last updated: June 2, 2026
Overview
DualView is a browser extension that shows two subtitle languages at once on Netflix, Prime Video, Disney+, YouTube, Udemy, TED and Coursera, with click-to-dictionary, sentence replay, and optional AI study features. Core subtitle features work entirely on your device and require no account. This policy explains what data we handle and why.
What we collect
- Account data (optional). If you create an account to use AI features, we store your email address and a securely hashed password. We never store your password in plain text.
- Learning data (only when signed in). To generate personalized AI features (translation, grammar explanations, daily conversations, weekly stories, card chats), the extension sends the relevant subtitle text, the words you look up, and your learning preferences to our backend.
- Local settings. Your preferences (languages, font size, position, etc.) and login tokens are stored in your browser's local storage on your device.
Third-party services
When you use the built-in (non-AI) translation or dictionary, the selected subtitle text is sent to Google's public translation endpoint to return a translation. No account information is included in those requests.
How we use your data
Data is used solely to provide the extension's features — showing subtitles, translating text, and generating your personalized study content. We do not sell your data, and we do not use it for advertising.
Permissions we request
- Storage — to remember your settings and keep you signed in.
- Host access — to read the subtitle track on the supported streaming sites, fetch translations, and (when signed in) talk to our backend.
Data retention & deletion
You can sign out at any time to remove tokens from your device, and uninstalling the extension clears its local data. To delete your account and associated learning data, contact us at support@dualview.app.
Social account data deletion (Facebook / Instagram / Threads / LinkedIn)
If you connected a Facebook, Instagram, Threads, or LinkedIn account through DualView, we store only the access token you authorized — used to publish posts and reply to comments on your behalf — and do not collect your profile or friend data. To delete this data: (1) remove the connected account in the DualView admin, or email support@dualview.app to request deletion, and we will delete the corresponding tokens and related data within 30 days; (2) you may also revoke DualView's access in Facebook → Settings → Business Integrations (or each platform's app-authorization settings).
Contact
Questions about this policy? Email support@dualview.app.