Google's Rich Results Test is the authoritative validator for structured data eligibility. StoreVitals continuously monitors structured data across your site and alerts when schema regresses or rich-result fields go missing.
Use both. Google Rich Results Test is the source of truth for whether a single URL is eligible for a specific rich result — keep it bookmarked and check any URL where you've made schema changes. StoreVitals is the source of truth for whether your store as a whole has schema coverage and whether anything has regressed since last week. The Rich Results Test is the microscope; StoreVitals is the dashboard. Most stores need both: one for diagnostic deep-dives, one for continuous coverage and alerting. Critically, StoreVitals also includes a free Product Schema generator (https://store-vitals.com/tools/product-schema) so you can fix the gaps the audit surfaces, in the same workflow.