Privacy Policy | SAT Algebra and Advanced Math Practice Questions
This page explains the main categories of information used by Discrete Math Tutor to keep practice sessions working on a remembered device without a traditional account.
Last updated: May 6, 2026
Information used to run the site
The site stores practice-session data you submit, such as your display name, selected topics, answers, progress state, and a passphrase-derived resume identity when you choose to save progress.
Remembered-device resume
When you save progress on a non-shared device, the site stores a device token in a browser cookie so it can restore your saved session later without asking for a separate account ID on that device.
Shared-device choice
If you mark a device as shared, the site avoids remembering you on that device for the no-ID resume flow. You can also use the forget-device option to remove remembered-device resume on that browser.
Storage and retention
Session and resume records are kept for limited periods configured by the service and may be stored in Redis-backed infrastructure. Operational logs may also be collected for security, debugging, and reliability.