Best free A/B testing and experiments Shopify apps in 2026 [Updated]

The Best Free Shopify A/B testing apps help merchants make data-driven decisions to improve their stores. From price testing and shipping experiments to template variations and personalized content, these tools enable store owners to optimize conversion rates without upfront costs. Whether you need to test product pricing, analyze checkout flows, or experiment with different themes, these free solutions offer essential features for running controlled experiments and measuring what truly works for your online store.