Do Shopify quiz apps slow down your store?

They can, but it depends heavily on the app and implementation. The main performance concern is JavaScript load — some quiz apps inject heavy scripts on every page, even when the quiz isn't visible. Look for apps that use lazy loading or only load scripts on pages where the quiz actually appears. Embedded quizzes generally have more impact on page speed than quizzes hosted on their own dedicated page or loaded on click. Before committing to any quiz app, test your store's page speed with and without the app installed using tools like Google PageSpeed Insights or Lighthouse. The best quiz tools are built with performance in mind and have minimal impact on your core shopping pages.