Best free Site optimization - Other Shopify apps in 2026 [Updated]

The best free Shopify site optimization apps help merchants improve their stores through essential tools like AMP pages, redirect management, and user behavior analytics. From fixing 404 errors and managing redirects to implementing heatmaps, session recordings, and A/B testing - these apps deliver core functionality for enhancing site performance, SEO, and user experience. Whether you need to analyze customer journeys, personalize content, or speed up mobile pages, these free solutions provide the features needed to optimize your Shopify store without additional cost.