Cookies & Analytics
What browser storage is used for in 310S Master.
Last updated: October 5, 2026Essential session cookie
310S Master uses an essential secure, HttpOnly session cookie to keep signed-in users authenticated. This cookie is necessary for protected account features and is not used for advertising.
Local browser storage
The site stores small local flags such as whether an account was previously created on the current browser and, when applicable, which Premium plan was selected. These values improve navigation and do not contain payment-card details.
Payment security
When Stripe checkout is enabled, Stripe Elements, Apple Pay, Google Pay, Link, or related fraud-prevention services may use browser storage or cookies required to securely process and authenticate payments. Those technologies are controlled by Stripe and the relevant wallet provider.
Product analytics
310S Master uses product analytics to understand page usage and improve study tools. Before you choose, analytics runs without storing a session identifier in your browser. If you select “Allow analytics,” a random analytics session identifier may be stored locally. If you continue without storage, analytics remains in memory only. We do not use this choice to sell personal information or serve behavioural advertising.