# SimGym correlates 0.7 with real add-to-cart, but App Store rating hits 2.9 stars

- slug: simgym-correlates-07-with-real-add-to-cart-but-app-store-rating-hits-29-stars
- date: 2026-04-22
- category: Artificial Intelligence

Shopify open-sourced its internal ML pipeline engine and showed 5x search gains. Now it is opening a customer simulator to merchants — with a 2.9-star App Store rating and a self-reported 0.7 correlation stat that has not been independently verified at merchant scale.

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