Set up the extension on your phone
Add CompGenies in one tap from the Chrome Web Store, then point it at any card in a live auction — it identifies the card and shows real eBay sold prices, the value range, and recent sales so you know what to bid.
CompGenies
Real eBay sold comps · One extension, every deviceKnow what every card isactually worth — right inside the auction.
The CompGenies browser extension sits in the corner of your screen while you watch Whatnot, eBay Live, or TikTok Live. Tap once and it reads the card and shows the real eBay sold price — on your computer, your iPhone, or your Android.
5 free scans to start · no credit card · no password to remember
5 free scans on your trial Works in your browser Never bids for you
Watch how it works
Start using it in minutes
Watch the narrated videos — set up the extension on your phone, then build and manage your Collection.
89 seconds
Build and manage your Collection
Add a card photo, check its details, record your cost, and follow its value and profit.
Chrome on your computer Orion on iPhone · Kiwi on Android Collection management
Two ways to stop guessing prices
Pick the tool that fits what you're doing right now. Both use the same real eBay sold comps.
Browser extensionLive auction comps, anywhere
The CompGenies extension reads the card on your Whatnot, eBay Live, or TikTok Live stream and shows the median sold price, recent sales, and full range before the hammer drops.
- Chrome on your computer
- Orion on iPhone · Kiwi on Android
- Live eBay sold comps
- Sports cards, TCG, and everything else
Collection trackerTrack your card collection
Upload photos of your cards. CompGenies names each one, prices it from sold comps, and tracks your portfolio value and P&L with live graphs.
- Snap a photo, get the card
- Value graphs over time
- Buy price vs. sale price P&L
Free trial included — no card needed
How to use the Collection tracker
Photo to portfolio in four steps
Tap through the walkthrough to see exactly what happens after you add a card — on your phone or on your computer.
1 · Add a card photo
On your phone, tap Add card and take a picture of the front of the card. On a computer, drop in a photo you already have. Raw cards and graded slabs both work.
Photo addedfront.jpg
Reading the card2–4 seconds
Live onWhatnoteBay LiveTikTok Live
A live auction gives you 20 seconds to decide.
The seller holds the item up, the chat starts hyping, and the price climbs $5 at a time. By the time you've opened a new tab, typed the title into eBay, and switched the filter to Sold Items, the lot is gone — or you've paid 40% over what it's worth.
That's the whole problem. Not a lack of data — eBay has decades of it. A lack of time.
20s
Typical time a lot stays open
3 taps
To search sold comps by hand — if you're fast
40%
Overpay it takes one hyped chat to create
0
Comps most buyers actually check mid-stream
Everything you need to bid with a number in your head
CompGenies does one job and does it fast: turn the item on screen into real sold data.
Live sold comps
Hit scan and the median sold price, range, and latest sales land on screen before the bidding heats up.
Any category, not just cards
Watches, sneakers, comics, toys, tools, vintage clothing — if it sold on eBay, CompGenies finds it.
Computer, iPhone, or Android
One extension: Chrome on your computer, Orion on iPhone, Kiwi on Android. Same comps everywhere you watch.
Know your walk-away number
A hard price range keeps you from chasing a $180 item to $260 because the chat got loud.
Scan history
Every lot you scanned, saved with the comp data — review what you won and what you dodged.
Stays out of the way
A small draggable panel you can collapse. No autoplay noise, no bidding on your behalf, ever.
Real screens, real sports card comps
The live overlay, your portfolio dashboard and the per-card comps report — pulled straight from eBay sold listings.
Live overlay on the stream
Median sold, low→high range and recent sales for the card on screen.
Portfolio dashboard
Market value over time, cost basis, realized and unrealized P&L, biggest movers.
Card comps report
Median comp, spread, sale count and P&L for every card, with the eBay sold link.
LiveWhatnot
CompGenies auto
Detected item
2018 Panini Prizm Luka Doncic #280 RC · PSA 10
Median sold
$812
Range
$725 – $950
- $812.00Best offer acceptedAug 24
- $795.00AuctionAug 22
Scan itemeBay
The overlay, on the stream, where you're already looking
Median sold price
The single number that tells you whether the current bid is a deal.
Recent sales with dates
Because a comp from 2021 is not a comp. Freshness is shown per sale.
Full eBay sold search, one click
Want to dig in? Open the exact filtered search in a new tab.
New — free with your account
Track your collection like a portfolio
Upload cards from your phone or desktop. CompGenies names each card, prices it from sold comps, and keeps a running P&L so you always know what your collection is worth.
Snap a photo, get the card
The same vision engine that reads live streams identifies player, year, set, number, parallel, and grade from a single photo.
Real-time market value
Every card is priced against fresh eBay sold comps — median, low, high, and how many sales back it up.
Portfolio dashboard
See total cost basis, current market value, realized profit, and your top cards at a glance.
Track buys and sales
Log purchase price, sale price, and dates so you know exactly what you made — and what you're holding.
247
Cards held
$8,420
Cost basis
$12,180
Market value
$1,340
Realized profit
Portfolio value over time
2018 Prizm Luka Doncic #280 PSA 10$600.50
2003 Topps Chrome LeBron James RC$1,240.00
1986 Fleer Michael Jordan #57 PSA 8$3,100.00
What buyers say
Placeholder reviews — swap in real testimonials at launch.
"I used to screenshot items and search eBay on my phone while the lot was closing. Now the number is just there."
"Auto mode is the whole product for me. Comps refresh as the seller moves to the next lot and I never lose the stream."
"Paid for itself the first night. I passed on two lots that were going way over comps."
Simple pricing
Three monthly plans — 50 comps, 100 comps, or unlimited. Pick what fits how often you bid, and upgrade any time.
Starter
For casual buyers who bid a few nights a month.
$19/ month
50 comps / month · cancel anytime
- 50 live auction comps per month
Most popular
Plus
For regular bidders who want room to spare.
$27/ month
100 comps / month · cancel anytime
- 100 live auction comps per month
Unlimited
For breakers and heavy bidders every night.
Coming soon
Not available to choose yet
- Unlimited live auction comps
Your next lot is 20 seconds long.
Start with 5 free scans, then use it on your computer, iPhone, or Android and walk into the next lot knowing what the card is worth.