Built on your real numbers
We work from your actual orders, refunds and product costs — not a vanity score. If your own data doesn't back a claim, the app doesn't make it.
Independent software studio
We build Shopify apps that protect your margin.
ShelfCompass makes small, sharp tools for Shopify merchants. Each one takes the order data you already have and turns it into fewer wasted discounts, fewer money-losing orders, and a straight answer to a question most stores can't answer: where is the profit actually going?
MarginGuard is live. The next app is in the workshop.
Your Klaviyo listMargin view
JRJordan R.Full-price repeat buyer
+$412
Keep
MPMia P.Buys twice a year, no codes
+$286
Keep
DKDana K.Returns 6 of 10 orders
−$174
Stop
SLSam L.Only ever buys on a code
−$93
Stop
How we work
Small tools. One job each. Nothing you have to babysit.
There are enough Shopify apps that promise everything and touch every corner of your store. We go the other way. A ShelfCompass app solves one real problem, works from your own numbers, and then gets out of your way.
One job, done all the way
Each app handles a single problem from end to end. You connect it once, it does the work, and you don't have to think about it again.
Quiet by default
Our apps read only what they need and change nothing they weren't asked to. No emails to your customers, no surprise edits to your store.
Our apps
One live today. Built for Shopify and Klaviyo.
Live
Shopify · Klaviyo
MarginGuard
Some of the customers on your discount list quietly lose you money — heavy returners, people who only ever buy on a code, orders that cost more than they bring in. MarginGuard finds them from your real order data and builds a "don't discount" list in Klaviyo, so your next promo skips them automatically.
The next one
We're picking the next margin problem worth solving properly. If something specific is eating your profit — shipping that never pays for itself, a category you suspect runs at a loss — we'd genuinely like to hear it.
3
Margin signals we read — refunds, discount-code habits, and cost-vs-price on every order.
0
Emails we send to your customers. We hand the list to Klaviyo; your campaigns stay yours.
2
Tools we connect — Shopify for the orders, Klaviyo for the list. No new dashboard to live in.
Find out who's really costing you money.
MarginGuard reads your last year of orders and shows you, name by name, which repeat customers are worth a discount and which ones aren't. Then it keeps the list current on its own.