Rocket Page Speed Optimizer is one of the best free page speed optimization apps for Shopify stores in 2025. It offers automatic optimization that can increase PageSpeed scores from the 40s to 90s across your entire site, including blog pages, product pages, and homepage. The app effectively improves Google Core Web Vitals metrics including LCP, FCP, and CLS, with excellent customer support that responds quickly to technical issues. The 7-day free trial allows you to test the optimization before committing.
Consider Microsoft Clarity: AI Insights (3.2/5 stars, 18 reviews) which offers free conversion optimization with AI analytics, recordings, and heatmaps. Lucky Orange Heatmaps & Replay (4.8/5 stars, 801 reviews) also has a free plan and helps spot friction with visual data. Propel Replay, Survey, Heatmap (5.0/5 stars, 410 reviews) offers free plans with session recording, analytics, and surveys. These alternatives focus on different aspects of site performance optimization.
Start by signing up for the 7-day free trial at the app listing. The system will generate a preview domain where you can see all optimizations applied before going live. This allows you to test the performance improvements without affecting your actual store. Once satisfied, you'll need to point your domain name to the CDN IP to activate the optimizations on your live site.
First, check if you're using incompatible third-party apps like wishlist or dynamic buttons that may cause conflicts. Contact the support team immediately with details about which elements are broken. The app includes an uninstall button to easily remove app code from your theme if needed. For persistent issues, consider temporarily disabling other optimization apps to isolate the problem.
The app automatically scales your site's images according to visitor screen size and converts them to WebP format to reduce file size. This includes responsive image sizing, lazy loading, and automatic WebP conversion. You never need to worry about image sizes again as the system handles all optimization dynamically based on device type and screen resolution.
