| Slabline | ZeroPop | |
|---|---|---|
| Values from recorded sales, by grade | Every grade, from 6.25M recorded sales (eBay, marketplaces, auction houses incl. Heritage and Goldin) | eBay live listings and recent sales |
| Population / gem rate | PSA, BGS, SGC & CGC (GemRate) | — |
| AI Pre-Grade (free allowance) | 10 free a month with a free account (2 as a guest) | 2 free a month; PSA/BGS/CGC estimates on Ultra |
| Insurance / appraisal schedule | Insurance-ready appraisal schedule | — |
| Cert lookup | PSA, BGS, SGC & CGC | — |
| In ChatGPT | Listed ChatGPT app | — |
| Price | Free; Collector $9.99/mo; Insured $14.99/mo; Pre-Grade packs from $0.99 | Free (2 a month); Lite $3.99/mo; Pro $9.99/mo; Ultra $24.99/mo |
| Cards covered | 1.57M cards: sports, Pokémon, Magic, Yu-Gi-Oh, One Piece, Lorcana, Riftbound and more | Pokémon, Magic, Yu-Gi-Oh, baseball, football, basketball, hockey, soccer |
| Platforms | iOS, Android, web, ChatGPT | iOS (iOS 26+), Android |
Facts as of November 4, 2026.
— = not found in the app’s public listing or website as of November 4, 2026. It may exist; we could not confirm it.
Names belong to their owners. Facts are from each app’s public App Store listing, website or press release as of November 4, 2026. Corrections welcome — email brian@hobbysmartcases.com.
What ZeroPop does well
- Break-even grade and expected profit at each PSA grade before you submit
- PSA, BGS and CGC grade estimates (Ultra tier)
- Portfolio with cost basis and profit/loss; set tracking
Where Slabline differs
- Slabline values every grade from 6.25M recorded sales across marketplaces and auction houses, not eBay alone
- Population and gem rate for PSA, BGS, SGC and CGC on every card
- 10 free Pre-Grades a month versus 2
- Insurance-ready appraisal schedule; Slabline is also a listed ChatGPT app
Which should you choose?
- Choose ZeroPop if…
- You mainly want a phone grader with submission maths and you sell on eBay.
- Choose Slabline if…
- You want values backed by auction-house and marketplace sales at every grade, population data, and insurance documentation — with more free Pre-Grades.
See it on your own card
Pre-Grade a raw card free — 10 a month with a free account — or look up what a graded card sells for at every grade.
