Murm builds fast, honest browser extensions that turn public data into a clear read on any store, product, or market — right where you're already working.
Store analytics for any Shopify store or TikTok Shop listing: best sellers, pricing, a competitor watchlist that flags what changed, app & theme detection, and TikTok sold-counts. Every estimate honestly labeled.
Get it on the Chrome Web Store →A factual side-by-side of the Shopify research extensions — permissions, package size, and the difference between measured data and server-side estimates. Includes head-to-heads with Koala Inspector and PPSPY.
Read the comparison →Click the icon on any page and see how many separate companies it contacted — and how many arrived before a cookie banner could ask you anything. Free, two permissions, no host access.
What MurmStack reports →Reads the Meta Ad Library page you are already on: which creatives are scaling, how long each has run, and the EU spend ranges Meta itself discloses. No modelled spend figures.
Ad Library tools compared →Shopify apps inject their own scripts into a storefront, so the app stack is visible in the page a store already serves you. MurmSpy matches those scripts against 137 maintained fingerprints and names each app with the evidence it matched on — reviews, email, upsell, subscriptions, page builders and more. Detection is free and unlimited.
Shopify exposes the active theme in the storefront's own JavaScript. MurmSpy reads the canonical theme name — the one Shopify knows it by, such as "Dawn" — rather than the label a merchant gave their duplicated copy, which is usually a string like "Copy of theme-export__abc123". Both are shown.
A Shopify storefront leaves several public markers: assets served from
Shopify's CDN, a window.Shopify global, and specific meta tags.
Checking any one of them is enough. MurmSpy reports which markers it found, so
the answer is verifiable rather than a guess.
No. Sales, revenue, traffic and ad spend are not present in a public storefront, so no browser extension can read them. Tools that display them are estimating, and the estimates vary widely. MurmSpy reports what is provable — best-seller order, prices, launch cadence, the app stack — and labels every derived figure with its method.
Check the permissions before installing. In this category many tools request
"read your data on all websites", plus cookies,
identity or management access that a storefront reader
does not need. MurmSpy requests storage, activeTab and
scripting only, and has no server to send anything to.
Yes — the free tier is permanent, not a trial. It covers 25 products per store, the top 10 best sellers, full app and theme detection, a 3-store watchlist and one export per day. Pro is €8.99 per month or €69 per year and lifts those limits. Full breakdown at /pricing.md.