Ruby is a live price-check assistant that runs alongside your Whatnot stream. Here is exactly what it does, step by step, while a lot is on screen.
It reads the item on screen
Ruby identifies the card or item currently up for auction from what's visible in the stream. You don't type anything — it works in the flow of the show.
It pulls real resale comps
Ruby matches the item to recent sold data so you're looking at what buyers actually paid, not asking prices. That comparison is the difference between a guess and a decision.
It does the reseller math
Ruby takes the current bid, adds the fees and shipping, and compares your all-in cost to realistic resale. The result is your estimated flip profit, shown live as the bid climbs.
It gives a clear call
Instead of a wall of numbers, Ruby gives a verdict: BUY, THIN, or PASS. Crucially, Ruby never bids for you — you stay fully in control of every bid.
The goal isn't to bid more. It's to bid on numbers instead of adrenaline.