Privacy Policy

Last updated: November 13, 2026

Service and Data Handling

Lingo Immersion is a Chrome extension that helps you build a language listening habit using YouTube. Routines, learning settings, and play records are saved in the extension’s storage on your device.

The extension does not send data to a developer-operated server or integrate a separate analytics service. However, when you use the playback feature, search keywords are sent to YouTube’s servers, and Google may collect and use information as described below.

Data We Store

The following information is saved in chrome.storage.local on your device:

• Routines: name, search keyword, scheduled time, repeat setting, enabled status, study language and level, display language, and last played date.
• Recent plays: up to 5 distinct recently played keywords and their timestamps.
• Keyword usage stats: play count for each keyword, last played timestamp, study language and level, play source, and display language. When the data exceeds approximately 5 MB, entries with the oldest last played timestamps are deleted first.
• Daily progress: number of routines played today, current streak count, and last activity date.
• Settings: display language, study language, and study level.

The extension does not require registration or ask for your name, email address, or account information. If you enter personal information in a routine name or search keyword, that information may be saved on your device.

YouTube Access and Google’s Data Handling

When you play a keyword, the extension opens a YouTube search results page in your browser. The keyword is included in the URL and sent to YouTube’s servers. The extension reads video links in the search results and navigates to the first video.

When you open the routine creation form while viewing a YouTube video, the extension reads the current tab’s URL and video title to suggest the title as a search keyword. If you save the routine, that keyword is also saved on your device. The extension does not read your YouTube account information or watch history.

YouTube may collect information such as search keywords, viewing activity, IP addresses, cookies, and browser identifiers. Google uses this information to provide and improve its services and may also use it for recommendations or personalized advertising, depending on your settings and other applicable conditions. Activity may be associated with your Google account depending on your login status and settings. Google’s collection and use of information are governed by the Google Privacy Policy.

Data Sent to the Developer

The extension currently has no feature that sends user data to a developer-operated server or transmits usage statistics to a separate analytics service. It does not use external services or APIs other than YouTube and does not load CDN resources.

If a feature that sends usage statistics to the developer is added in the future, we will explain what information will be sent and why, and obtain your explicit consent beforehand.