It measures a trading card’s centering from a photo and reports both axes to 0.01 mm (on synthetic test photos, 97% of the readings shown without a warning were within 1 percentage point), compares it with the centering lines that PSA, BGS, CGC, SGC, TAG and ACE publish, then prices every grade the card could get from prices looked up in PriceCharting’s guide (sports prices you enter) and applies each service’s current fees and tiers to show the expected net of grading versus selling raw — and which service and tier maximises it.
No. Every figure is an estimate built from published standards, published fees and the prices you enter or look up. Grading companies decide grades at their discretion and change standards and fees without notice; prices move. Check the official sources before you spend money.
On 640 synthetic photos with known answers, including tilt, glare, blur and cards in sleeves or top-loaders, 97% of the readings shown without a warning were within 1 percentage point. Hard photos (busy backgrounds, heavy blur, full-art cards whose art matches the border) come with a warning to check the lines instead, and every corner and guide line can be corrected by hand with a magnifier. Details on the How we measure page.
$3/month, renewing monthly until you cancel, plus any tax we must collect. The home page shows a sample verdict so you can see what you get before subscribing. There is no account: your subscription is a licence that lives in your browser, locked to it, and works on up to two devices.
Not yet. Subscriptions are available in the United States and its territories only, with a US billing address. The centering standards and fee pages work from anywhere.
Open the subscription panel in the app on any device and choose Manage subscription (or Manage billing); Stripe emails a one-time code to the address you paid with, then opens its secure page where you can cancel in a few clicks, change your card or download invoices. Cancelling stops future charges and your access continues to the end of the paid period. You can also email us.
Payments are final and non-refundable, including partial months, except where the law gives you a right we cannot exclude. If you are a consumer in the EU or UK you may withdraw within 14 days of subscribing and receive the first payment back less a proportionate amount for the days of service you used.
Open SlabbyPrep there, choose Subscribe, and under “Already subscribed?” enter the email and the last four digits of the card you paid with. We look them up in Stripe and keep neither on our side; both must match. A subscription works on two devices at a time. A third device takes the place of the one used least recently, up to twice in 30 days; a licence copied from one browser to another does not work.
Nothing about you: no accounts, database, cookies, analytics or logs of our own. Photos, measurements, the prices you enter and your batch stay in your browser, with your licence and device key. The exceptions: Stripe processes payment (email, billing address, card) under its own policy; your Stripe subscription carries the Terms acceptance stamp, up to two random device codes with their dates and recent device moves; the email you type to add a device is looked up in Stripe, which logs the lookup; Vercel, our host, sees IP addresses and keeps its request logs for 1 hour; card searches go to PriceCharting from our server, without your IP; IP and email are held in memory for up to an hour after the last try to limit guessing. Details on the Privacy page.
Yes. SlabbyPrep is for adults 18 and older.
PSA, Beckett (BGS), CGC Cards, SGC, TAG and ACE. Each service’s lines and fees are quoted with the date they were checked on the Standards page.
PriceCharting’s price guide, used with their permission and credited with a link to the card’s page wherever a price appears: the ungraded price, prices for grades 1–9.5 from any grading company (PriceCharting’s 7 and 8 include 7.5 and 8.5) and each company’s own 10. Searches return trading cards only — Pokémon, Magic, Yu-Gi-Oh, One Piece, Lorcana, Dragon Ball, Digimon, Star Wars, Marvel and other card lines. Sports cards are not in PriceCharting’s guide, so enter their prices by hand (links to recent sales are provided). Fees come from each grading service’s published table.
No. Those are trademarks of their owners, and SlabbyPrep is not affiliated with, endorsed by or sponsored by any of them.
Yes. It runs in the browser on any recent phone, tablet or computer; on a phone you can shoot the card directly from the app.
Questions we didn’t answer: crabtreecollections@gmail.com.