TL;DR — Existing Shopify app detectors (Koala Inspector, ShopScan, Fera, BuiltWith) are Chrome extensions or SaaS dashboards. None do batch. I had 1,200 stores to qualify and View Source + Cmd-F was killing my afternoons, so I shipped an Apify actor that takes a list of Shopify URLs and returns the full app stack (Klaviyo, Yotpo, Judge.me, Loox, ReCharge…) + product catalog + reviews in JSON. No headless browser, ~$0.005 per store, 1,000 stores in 25 minutes. Live here → Shopify Scraper – Apps Spy + Reviews . The afternoon that broke me Six weeks ago I was prospecting for a B2B side-project. The hypothesis: "Shopify stores running Klaviyo + a paid reviews app are the right ICP — they spend money on retention tooling, so they will pay for ours." To validate, I needed a list of Shopify stores and their installed apps. The Shopify App Store does not give you that. The "stores using X" databases do, but the public ones are stale and the good ones are paid SaaS at $99–499/month for filters I did not need.…