The guides, About and Sources pages
These pages use Google Analytics to see which guides are useful and which aren't — page views only, no personal details are collected on purpose.
If you join the email list on the homepage, your email address is stored by Mailchimp to send occasional updates. It's never shared or sold, and every email has an unsubscribe link.
Game Flow
The Game Flow tool is different: it has no analytics, and nothing about a game — including player names — ever leaves your device. See how Game Flow handles your data for the detail.
Questions or a correction
Email ravisundram@gmail.com.