Ruby — Live Flip-Profit Assistant for Whatnot

Know your flip profit before you bid.

• See your real profit on every lot — Ruby prices the item, subtracts fees and shipping, and shows what you’d actually net after reselling it.
• Get an instant BUY / THIN / PASS call — hands-free, mid-stream, updated live as the bidding climbs.
• Never overpay again — the moment a lot flips from profit to loss, Ruby turns red and tells you to walk.

Whatnot auctions move too fast to do the math in your head. By the time you’ve priced a slab, subtracted fees and shipping, and checked comps, the lot is already sold. Ruby does all of it the instant an item hits the screen, so every bid you place is backed by a real number instead of a gut feeling. If you buy to resell, she’s the difference between guessing and knowing.

Launch-month offer: $29.99 lifetime license. After launch, $15/month. Runs on your Mac alongside your Whatnot stream.

Ruby is an independent tool, not affiliated with Whatnot, eBay, or TCGplayer. Profit figures are estimates based on market data, not guarantees. Ruby never places bids — you stay in control.