# Store detector tools for Shopify app developers Source: watchfor.tools, an independent directory for people who build Shopify apps. No paid placement, no affiliate links. Not affiliated with Shopify. Canonical: https://watchfor.tools/categories/detect One store at a time. Paste a URL, see the stack. 11 listed here, and 3 more that also belong in it. ## Tools ### ShopScan Page: https://watchfor.tools/tools/shopscan Summary: App and theme detector with a wide free tool set. Price: Free, API paid Watch for: Monetized through affiliate links and a Shopify referral offer, so the surrounding recommendations are not neutral. ### WeLookup Page: https://watchfor.tools/tools/welookup Summary: Extension-first store analysis, 7,548 apps and tools. Price: Free Watch for: Small and new, version 1.0.0 at time of checking. Like every detector, it only sees apps with a storefront presence. ### Copyfy Apps Detector Page: https://watchfor.tools/tools/copyfy Summary: Paste a store URL and get its storefront apps, free and without an account. Price: Free, no sign-up Watch for: One store at a time and two pages deep. So it answers what a store runs, never which stores run your competitor. A run on allbirds.com returned five apps. No list of detectable apps is published. It exists to sell the Copyfy subscription to dropshippers. The 29,870+ sellers and 4.8 rating on the page are its own figures. ### Shopify Theme Detector Page: https://watchfor.tools/tools/shopthemedetector Summary: A free theme and app detector for one store at a time, with usage counts across its scans. Price: Free Watch for: Built for merchants copying a competitor's store, not for app developers. It answers what one store runs, not which stores run an app. Some of its links are affiliate links, including a Shopify sign-up banner, which it says keeps the site free. The dataset figures are its own, and the monthly app spend is an estimate. ### Koala Inspector Page: https://watchfor.tools/tools/koalainspector Summary: Chrome extension reading a store's apps, theme and estimated numbers. Price: Free, 15 tokens a month. Premium $22/mo, token packs from $3.99 Watch for: Monetized by affiliate links, to TikTok, Klaviyo, Zendrop, Printify and NordVPN among others. It also has an affiliate and an ambassador program of its own. So nothing it recommends around the data is neutral. No legal entity, country or person is named anywhere on the site. The sales and traffic figures are estimates published with no method attached. Use them to rank stores, not to quote one. ### TrendTrack Page: https://watchfor.tools/tools/trendtrack Summary: An ad and store research tool for ecommerce brands, with a free Shopify app detector. Price: Free app detector and extension. Starter $49/mo, Pro $89, Business $159 ($34 / $62 / $111 billed yearly) Watch for: It is made for merchants who study what other stores sell, not for app developers. Its store filters are traffic, growth, creation date and theme. Nothing on the site says you can list the stores that run a given app, which is the search an app developer would pay for. Starter allows 5 store lookups a week. The operator is HVSCALE SERVICES FZCO, a Dubai free zone company named only in the terms of service. The 100,000+ users and 1 million stores are its own figures. ### Stackpeek Page: https://watchfor.tools/tools/stackpeek Summary: Free browser extension naming a store's theme, apps and trackers, with a catalog export. Price: Free, no account Watch for: New, with 32 Chrome users at version 0.7.2 when checked, and its own site says so. Only the extension is open source. Each scan sends the store's address and page signals to its server, and the database there is not published. A paid tier is announced. No company or person is named, only registration in Andorra. Like every detector, it only sees apps with code on the storefront. ### Shoper Spy Page: https://watchfor.tools/tools/shoperspy Summary: Chrome extension listing a store's apps, theme and products. Price: Free to install, no paid plan stated Watch for: Built by ReConvert Ltd, which sells a post-purchase upsell app to Shopify merchants, now as Upsell.com. The listing says it "may get affiliate commission from installs initiated by the extension", so the apps it points you to can be paid placements. Its Chrome privacy disclosure lists personal, financial, authentication and communication data, with no reason given. No count of detectable apps is published. Like every detector, it only sees apps with code on the storefront. ### Shopify Raise Page: https://watchfor.tools/tools/shopifyraise Summary: Chrome extension for store analysis: products, live sales, apps and theme. Price: Free to install, no paid plan stated Watch for: App detection is one feature of five, and no list of detectable apps is published. It is built for copying: the export and the review download are meant for importing a competitor's products and reviews into your own store. Same owner as SellerCenter, listed here, which has its own free app detector. The only contact is a Gmail address. Last updated April 2026. ### PPSPY Page: https://watchfor.tools/tools/ppspy Summary: Dropshipper spy tool, with a store explorer and an API behind it. Price: Free plan, then $39 / $99 / $299 a month Watch for: It is not built for you, and it is listed for one part of it. Its own homepage says join 130,000+ merchants. The product, the price and the whole library around it are aimed at dropshippers choosing products. So the store explorer comes attached to something else and is priced with it. The order figures are AI predictions, not measured sales, and its own copy says so plainly. So they rank stores and do not report revenue. It names no company, entity or country anywhere on the site. It states that it issues no refunds. ### Wappalyzer Page: https://watchfor.tools/tools/wappalyzer Summary: Website technology stack analysis tool with technographic insights. Price: Free, then $250/mo to $850+ Scope: not Shopify-only Watch for: The tool lacks independent customer reviews, making it hard to gauge user satisfaction. There's no transparency about the actual number of customers or companies using the service. Although a founding year is provided, other establishment details like funding or team size are absent. Pricing, while published, might not encompass all potential costs for Enterprise services since details require a sales conversation. ### LetsMetrix Page: https://watchfor.tools/tools/letsmetrix Listed under: App Store ASO (https://watchfor.tools/categories/aso), and also in this category Summary: Category rankings and collections, with a free plan. Price: Free, Pro $19/mo, Studio $49/mo Watch for: Owned by OmegaTheme, which runs a large portfolio of Shopify apps. So the same conflict applies as with any tracker built by an app developer. Developer analytics sit behind a login, and the depth is unproven. ### TechLeads Page: https://watchfor.tools/tools/techleads Listed under: Store databases (https://watchfor.tools/categories/storedb), and also in this category Summary: Lists of websites by the technology they run, Shopify stores included, from $29 a list. Price: Free, then from $249/mo Scope: not Shopify-only Watch for: Built for any technology, not for Shopify apps. Its Shopify apps category lists 155 apps, a small part of the App Store, so most competitors you look up will not be detected. Its own Store Leads comparison says to stay on Store Leads for app and install depth. It is one founder's company in Mumbai, under Indian law. Its terms forbid using the data beyond your own business without a separate licence. ### SellerCenter Page: https://watchfor.tools/tools/sellercenter Listed under: Store databases (https://watchfor.tools/categories/storedb), and also in this category Summary: Dropshipper research platform with a 2.4M-store Shopify database and a free app detector. Price: 100 free credits a month, then $9.99 / $29.99 / $99.99 a month, half that billed yearly Watch for: It is not shown to answer the question this category exists for: which stores run my competitor. The app filter is a checkbox for whether a store has apps installed, not a choice of which app. The detector reads one store at a time, with no published method or app list. Every search shows at most 300 results on the free and Basic plans, and 1,000 on Expert. Free accounts cannot export. Sales and traffic are estimates with no method attached. It is built and priced for dropshippers. Refunds are limited to the first purchase within 24 hours. ## Related categories - Store databases (3 tools in both): https://watchfor.tools/categories/storedb - App Store ASO (1 tool in both): https://watchfor.tools/categories/aso - Analytics & billing (also in the directory): https://watchfor.tools/categories/biz - App Store data (also in the directory): https://watchfor.tools/categories/data