Cookies Policy
Last updated: September 7, 2026
Mental Math Pro uses cookies and browser storage to keep you signed in, remember your preferences and preserve your practice. Our Privacy Policy explains how account and activity information is handled.
Account and security cookies
Authentication cookies maintain your signed-in session. Temporary security cookies protect sign-in and Google account linking. Sessions last up to 24 hours; you can end them in Settings with Log out everywhere. Google sign-in and Stripe Checkout also use their own cookies on their hosted pages.
Guest practice
The mmp_daily_guest cookie identifies a browser's guest attempts so you can resume and later claim your progress. It can last up to one year. Its signed random value contains no email or Google profile. Clearing it removes that browser's ability to resume or claim those guest attempts.
Product measurement
The mmp_attribution_v2 cookie lasts up to 30 days. It remembers fixed categories for where you entered the product, a broad source such as search or direct, and the interface version. It does not store raw referral URLs, search queries or campaign text. These categories help connect practice, signup and checkout events. The site also loads Aizen measurement services described in the Privacy Policy.
Browser storage
Local storage remembers recent practice summaries and pending history claims. It remains until cleared or replaced by the app's bounded history. Account histories are kept separately on shared browsers. A free account can save recent summaries across devices.
Your controls
You can block or delete cookies and site storage in your browser settings. Blocking authentication cookies prevents sign-in. Clearing site storage removes unsynced practice results and preferences. Export your account data in Settings before deleting an account if you want a copy. For questions, contact us.