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Your reports say a product is selling. They don’t say it’s losing money once you count what you paid to land it and what you spent on ads. Marjn folds real landed cost and Meta ad spend into your margin — and answers it inside Sidekick.
Free plan, no card. Pro $19/mo with a 30-day full trial.
A “bestseller” can quietly drain your bank account.
Shopify Analytics, and Sidekick along with it, report revenue. The best they can do on profit is the number you typed into the Cost per item field — which for print-on-demand and dropshipping is usually blank, or just the base price with no shipping, duties, or fees.
Neither one knows what you spent on ads to make the sale. So a product can top your sales chart and still lose money on every order. Marjn is the piece that carries the two numbers Shopify can’t: your real landed cost and your ad spend.
Real margin math, wherever you already ask. Marjn plugs the profit gap in three places — the number, the source data behind it, and the moment it slips.
Ask Sidekick a margin question the way you already do — “what’s my net margin this week”, “which SKUs lose money after ads” — and Marjn supplies the profit numbers behind the answer. No dashboard to check, no export to reconcile.
Set the real cost to land each product — supplier price, shipping, duties, fees. Marjn uses it when Shopify’s cost field is empty or just the base price, so the margin reflects what you really paid.
Connect your Meta ad account, read-only. Marjn syncs daily spend and subtracts it where it belongs — so “profitable” means profitable after the cost of the sale, not before it.
Marjn watches your margins as ad costs move, and tells you when a product tips into losing money — before the month closes and the damage is done.
One number for the whole store’s true margin, plus the products dragging it down, ranked worst first. And it reads only what it needs — order totals and your own ad spend, no customer names or emails.
Three steps, then just ask. Most of your data is already in Shopify — Marjn only needs the two numbers it can’t see.
Add Marjn from the Shopify App Store. It reads your products and order totals on its own — nothing to import.
Set landed cost for the products where Shopify’s cost field is wrong, and connect your Meta ad account read-only.
Open Sidekick and ask about your margins. The answer now counts landed cost and ad spend.
> “Which products lose money after ads?”Watch Marjn find the real number: set a real cost, connect ad spend, and ask Sidekick for your true margin.
Start free. Every install gets 30 days of Pro. Free covers the core margin math from your Shopify costs; Pro adds the two things that change the answer — ad spend and real landed cost.
The details worth knowing.
Add Marjn, connect your ad account, and ask Sidekick the question Shopify can’t answer. Free to start, 30 days of Pro on the house.
Coming soon to the Shopify App Store
