Your best seller is out. Nobody told you.

Runway sends one list a week: what’s running out, when, and how much to order. You read it. Someone acts on it.

Right now, some of your products can’t be bought. Runway tells you which, and what they normally sell, in the first minute.

Monday list · one line, sample

Days of cover left: 4 days
Supplier lead time: 26 days
Order now: 282 units · $9,900

Sample figures. 74 days of cash tied up — and every number shows its working, so you can check it once against your admin and then stop checking.

Sound familiar?

You hired someone so you’d never have to look at this again.

Your best seller hit zero on a Tuesday.

You found out Friday, from a customer.

The low-stock alert fired at 10 units.

For that product, 10 units is two days. For the slow one next to it, 10 units is a month. Same alert. Useless both times.

So you ordered big. Just to be safe.

Now there’s a pallet of it in the 3PL, and the cash you needed for the next thing is sitting on a shelf.

Meanwhile the spreadsheet says your best seller is a slow mover.

Because every day it was sold out counted as a day nobody wanted it.

You’re still the one who notices.

Here’s what changes

Days of cover, against the supplier you actually use

Your best seller stops looking slow
Its sell rate is measured on the days it could actually be bought — so the products that move fastest stop being the ones that get under-ordered.
You hear about it in time to order
The warning is days of cover against your supplier’s real lead time — not a unit count. Nine days left with a 3-day supplier is fine. Nine days left with a 26-day supplier is already late. Runway knows the difference.
Every line prices the order
It says what the order costs and how long the cash is tied up. “282 short. Ordering costs $9,900, tied up about 74 days.” You can say no to that — and be right.

Every number shows its working: check it once against your admin, then stop checking. And your stock history starts the day you install — Shopify keeps only today’s number, and nothing before install can be recovered, by anyone.

Due diligence

The four reasons not to believe this — answered

“Shopify already shows me days out of stock.”

It shows the count. It doesn’t keep the history, doesn’t fix the sell rate, and doesn’t tell you what the reorder ties up.

“I already have low-stock alerts.”

At 10 units, whether that’s two days or twenty. They fire too late to do anything about it — that’s the most common complaint in the category.

“I could build this with Claude.”

The alert, maybe. Not the history. Shopify doesn’t store it, and you can’t build yesterday. It exists only if something has been recording it.

“I don’t need another dashboard.”

There isn’t one to check. One list a week to whoever runs inventory. One line a month to you.

We built the lost-revenue number too — then buried it.

Every tool in this category has one, and every one of them is a guess dressed as a fact. Ours is on the line as evidence, never as the headline — and it shows you the floor, the middle, and the guess everyone else prints as truth.

The difference

You stop being the one who notices.

Best sellers on the shelf. Cash not stuck in the rest.

Without Runway

You find out at zero. You order big to make it stop. The cash gets stuck. And you’re still the one who has to notice.

With Runway

Monday, one list. What’s running out, when, how much, what it ties up. Someone acts on it. Once a month, one line to you: what got reordered before it hit zero, and what didn’t.

Join the waitlist. Your stock history starts the day you install.

One list, every coming Leaf app — you’re first in line for all of them. Free stays free: it never expires and it never stops recording. This is the right call.

Silent images are already fixable today. Image Voice is live — run that scan now →