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Is your ad spend buying new customers, or re-buying the same ones?
Give it two numbers a month and see, in seconds, whether more spend is finding fresh demand or just re-buying the people who already know you.
Watch the walkthrough
Three steps
New customers and ad spend per month for up to twelve months, plus your gross margin.
Type them into the table, or let AI read your screenshots and hand you a filled-in link.
See instantly whether you're growing, slowing down, or just re-buying the same customers.
Three required numbers, plus one optional pair that unlocks your break-even and headroom.
Ad spend per month
Fastest: in Google Ads, click Ads Advisor (top right) and ask, Show a table of monthly spend across all campaigns, all statuses, for the last 12 full months, broken down by month only, oldest to newest. Screenshot the table (on a Mac, press Command+Shift+4 and drag over it).
Or by hand: Campaigns, set the range to the last 12 months, segment by month, and read the Cost column.
New customers per month
Fastest: in Shopify, open Sidekick (the “Ask anything” box) and ask, Pull a table of new customers by month for the last 12 months, starting from the 1st day of the oldest full month. Screenshot the table it gives you (on a Mac, press Command+Shift+4 and drag over it).
Or by hand: Analytics → Reports → Customers over time. Set the range to the last 12 months and group by month. Two months minimum.
Gross margin %
Order value minus product cost, as a percent. Shopify's profit report, or estimate from your top sellers. This unlocks your break-even ROAS. Make a note of the value to type into the tool below.
12-month spend per customer + average first-order value
Shopify → Analytics → Reports → Customer cohort analysis (Sidekick can't pull the per-customer figures, so use the report). Set the metric to Amount spent per customer, then read the second row, your oldest cohort, not the All cohorts summary. In that row, month 0 is your average first-order value and the 12-month column is your 12-month spend per customer. Make a note of both values to type into the tool below.
Enter your three numbers above and this prompt updates automatically.
The AI only reads the screenshots you paste. It never touches your accounts, and the link runs entirely in your browser.
What this means
What to do
Want the real read, done for you?
This is a quick, self-serve check on the numbers you typed in. Complicated accounts don't always fit a simple calculator: seasonality swings new customers month to month, and brand traffic can make spend look like it is buying new demand when it is really harvesting people already searching for you. When that's your store, I'll run the complete Ecommerce Growth Check for you, free, and show exactly where growth stalled.
Leave your email and I'll take it from there. No CSVs to export, nothing to install.
Got it, check your inbox. I'll email you two quick steps to give me read-only access to Google Ads and Shopify. It takes about two minutes, there is nothing to export, and you can remove my access the moment I am done. Then I run the full read against your real data and send it back.
No spam, unsubscribe anytime. Prefer to start on your own? Grab the printable ROAS target instead.