The short version: we know nothing about you, and we like it that way.
Nothing. FlickToss has no accounts, no analytics trackers, no advertising and no third-party scripts that profile you. All randomness is generated inside your own browser.
Your preferences — coin labels, wheel choices, theme, sound — are saved in your browser's local storage so the site remembers your setup next time. This data never leaves your device and you can erase it anytime with the Delete all saved data button in the settings, or by clearing your browser data.
When you use "Copy setup link", your configuration is encoded into the link itself. Anyone you send it to can see those settings — that's the point. Nothing is stored on any server.
Questions? Write to hello@flicktoss.com.