Your quiz data (questions, options, product assignments, design settings) is preserved in the database after uninstallation. The shop is marked as deleted but data is not removed. If you reinstall the app, your existing quizzes will still be available.
However, the live quiz on your storefront will stop working immediately upon uninstallation because the app is no longer connected to your store. Shoppers will not see the quiz widget until you reinstall.
While quiz data persists, your active subscription is cancelled on uninstall. If you reinstall, billing starts fresh from the Free tier.
If you want to pause the quiz without uninstalling, unpublish the quiz from My Quizzes or remove the widget block from your theme. This hides the quiz from your storefront while keeping the app installed and all data intact.