Live buying is fun. That is the whole point. A show starts, the timer runs down, you win a card or a pair of sneakers or a Funko you did not need, and forty seconds later you are back in the next show.

What is not fun is the week after. Packages by the door. Screenshots buried in your camera roll. A shelf of boxes and slabs you cannot put a number on. The buying is a hobby. The record keeping turns into a second job.

WhatInStock is the app I built to take that second job away. It is in beta now, built for Whatnot buyers first.

What the app actually does

Four things, and only four. I kept the scope tight on purpose.

Log every win. Purchases, prices, sellers, and shows land in one clean stash. No more scattered screenshots, no more scrolling your order history to remember what you paid for something in March.

Know your numbers. Portfolio value, cost basis, and realized profit update as you go. It is the view a brokerage app gives you, pointed at your collection instead of your retirement account. You can see what you are into something for and what it is worth now, in the same glance.

Receipt traceability. This is the part beta users react to. Point your camera at a receipt and record a short video, and the app reads the item details out of it. Every deal ends up documented without you typing a row into a spreadsheet.

Resale ready. Items move from in stock, to listed, to sold, and your margins follow them through. If you never sell a thing, that is fine too. The tracking works exactly the same for someone who just wants to know what their collection is worth.

Why a spreadsheet was not the answer

Most serious buyers I talked to already had a spreadsheet. Most of them also admitted it was three weeks out of date.

That is the real problem. A spreadsheet only works if you feed it, and nobody wants to do data entry after a fun night of bidding. The interesting part is not the storage, it is the capture. If logging a win takes longer than winning it did, the system fails, and every one of those spreadsheets proves it.

So WhatInStock is built around capture first. Video receipts instead of typing. Status changes instead of formulas. The numbers assemble themselves out of what you were going to do anyway.

Buyers first, sellers next

There is a path most Whatnot people walk. You buy for fun, you end up with more than you meant to, you sell a few duplicates, and one day you realize you are running a small business in your spare time.

Buyers who know their numbers make better sellers. They know what they paid, what sold, and what a good deal looks like, because they have been tracking it all along. That is the arc the app is built for, and it is why the buyer side came first.

Where the beta stands

WhatInStock is in active research and development with a small group of beta users. It is free to try while the beta runs.

Two honest notes. WhatInStock is an independent companion app and is not affiliated with, endorsed by, or connected to Whatnot. And it is beta software, so you will find rough edges. That is what beta is for, and the feedback from these first users is shaping what gets built next.

If you buy on Whatnot and you have a shelf you cannot put a number on, try it at whatinstock.com and tell me what breaks.

What is coming

The near term list is short and driven by what beta users ask for most: faster bulk entry, better resale price signals, and a cleaner path from in stock to listed. Longer term, the interesting work is on the seller side, where handling notes and inventory availability get shared between buyer and seller.

I build these in public. If you want to follow along, the video above is the short version, and this page will stay updated as the beta moves.