Privacy

Updated October 2, 2026

Your learning data

Guest lessons run without an account. Sign in with ChatGPT to save lesson scores, daily activity, your display name, goal, and timezone. These records are tied to your account identifier. Your sign-in email is used for payment checkout if you subscribe.

Your music library

Custom track links, lyrics, translations, and case annotations are stored in your private account. They are not published to a public song catalog.

Other services

ChatGPT provides sign-in and hosting. YouTube receives a connection when you load an embedded video or open a YouTube link. Stripe processes payments when subscriptions are enabled; this site does not receive your card details.

Browser storage

The site uses essential sign-in and navigation cookies. Progress is saved on the server after sign-in. Guest practice is not retained as account progress.

Questions

Contact the project owner at contact@russiancases.com for questions about your account or a data request.