The Shopify app store has real AR options with reviews from real stores. That is a gift. Use it like a cynic. - File formats: it should handle GLB and USDZ, the two formats covering Android and iOS. - Where the button lives: buried or ugly means shoppers never find it. - Analytics: AR opens, dwell time, and AR-user conversion versus everyone else, or you are flying blind. - Theme compatibility and support quality: read the three-star reviews. Five-star reviews tell you what the vendor wants you to hear. - Pricing math: most AR ecommerce plugin SaaS tools charge per model, per month, or per view. Model your SKU count first. - Install on a staging theme first and click through the whole flow as a shopper would. Demos lie by omission. ModelSnap produces the 3D model and AR preview file, $4.99 per HD model.