Best Sports Card App in 2026: A Product Designer's Honest Take
Product designer Peter Perez Jr on what the best sports card app should actually feel like — and why he built his own.
It started with a Kobe.
When I was 13, I lost my Kobe Bryant rookie card. The kind of loss that sticks with you — the kind where you remember exactly where you were, exactly how it felt, and you never fully get over it.
Years later, I'm at the biggest card show in Pasadena, California. I'm not leaving without one. I searched every vendor. Nothing. Getting nowhere. Bought a $5 Sky Box to make the pain go away. Then I found it. Not one, but two PSA 9s.
Mission accomplished. 13-year-old me could finally rest easy.
I filmed the whole thing and it kind of blew up — 20k views, which for a card nerd with a phone camera is a lot. I haven't posted much since because I've been heads down building something.
Every App Has a Story. This Is Mine.
My name is Peter Perez Jr.
I grew up making backyard movies on a camcorder. VHS tapes. Writing scripts. Directing my friends. I fell in love with screenwriting before I knew what screenwriting was — I just knew I wanted to tell stories.
I went to film school. Life had other plans. Dead-end jobs. Sales floors. Long days.
Eventually I found my way into tech, and I've been designing products ever since. Websites first, then apps, now full platforms. But the storytelling never left. The way I design products — it's always about the experience. The feeling. How something moves, how it responds, how it makes you feel when you're in it.
I play Apex Legends. I study how games create moments — that rush when you clutch a 1v3, that tension of the final ring. Games understand something that most apps don't: the experience IS the product. Not the features. Not the data. The experience.
I collect cards. And when those two brains merged — the designer brain and the card brain — I started asking a question I couldn't stop thinking about:
What would a sports card app feel like if it was designed like a game? Like a story? Like something you actually wanted to open?
The Apps That Exist
Let me be real: CollX, Ludex, Card Ladder, TCDB — they're tried and tested. They work. If any of them do what you need, use them.
But none of them are what I imagined.
They're tools. Good tools. But they feel like tools. Open the app, check a price, close the app. There's no experience. No story. No feeling of "I want to be in here."
I wanted something different.
What I Imagined
I'm a designer who grew up making movies and playing games. So when I imagined the best sports card app, I didn't imagine a spreadsheet with a nice font. I imagined something alive.
I imagined walking up to a card show table, scanning a slab, and the app lights up. Not just a price — the full picture. Grade ladder. Recent comps. A BUY or PASS verdict. One screen, one moment, one decision. Like a HUD in a game — everything you need, nothing you don't.
I imagined tracking a show in real time — sales rolling in, profit updating live, the energy of the day captured in the app the way it feels at the table. Not a spreadsheet you update at midnight.
I imagined an AI that actually knows your cards. Not a generic chatbot. Something that looks at your portfolio, your market, and gives you a real verdict. BUY. SELL. HOLD. With data behind it.
I imagined it feeling premium. Interactive. Responsive. Like holding a PSA 10 — clean, considered, nothing out of place. The kind of experience where swiping between screens feels good. Where every animation has a purpose. Where the app respects the hobby the way the hobby deserves.
I imagined it feeling like a story. Every card show is a story. Every collection is a story. The app should feel like you're in one.
That app didn't exist.
So I built it.
That's Slabfy
The hobby deserves better tools.
Card people are some of the most passionate, knowledgeable, data-driven hobbyists on the planet. They memorize population reports. They study price trends across grades. They work card shows in the heat, negotiate all day, and track everything in notebooks and spreadsheets.
That community deserves an app that matches their energy. Something that respects the hobby. Something designed with the same care you'd put into protecting a PSA 10.
That's what Slabfy is trying to be.
- The Evaluate — because dealers shouldn't have to juggle three apps at a show table to decide if a slab is worth buying.
- The grade ladder — because "should I grade this?" deserves math, not gut feeling.
- The card show POS — because tracking sales in a notes app at midnight is insane.
- Consignment management — because spreadsheets don't scale and they're painful.
- Flip Finder — because the deals should come to you.
- The AI Analyst — because your portfolio deserves real analysis. BUY. SELL. HOLD. With data behind it.
And the experience — the way it feels to use it — that exists because I'm a designer who grew up on stories and games. I believe an app can be powerful AND feel alive. Data-rich AND fun. Serious AND interactive.
That's what I'm building. Not just features. An experience the hobby deserves.
The Honest Part
Is Slabfy the best sports card app? Honestly, I don't know. "Best" depends on who you are and what you need.
The other apps — CollX, Ludex, Card Ladder — they've been around longer. They've earned their communities. They work. I respect that.
Slabfy is new. Still in beta. Still being built every single week. We're not pretending to be something we're not yet.
But here's what I know: with AI, anyone can build an app now. The code is the easy part. You could spin up a card portfolio tracker in a weekend.
So the question isn't who can build an app anymore.
The question is who can build an experience.
Something that feels right. Something memorable. Something that treats this hobby — and the people in it — with the respect they've earned.
No dark patterns. No streak counters. No engagement tricks. No manipulation.
Just an honest app, being built in the open, getting better every week.
I Want to Hear From You
I'm building this thing in public, and I genuinely want feedback. Tell me what's working. Tell me what's not. Tell me what you wish a card app would do that nothing does yet.
If you're a dealer, a collector, a show vendor, a flipper — your perspective matters more than mine. I'm one person with one point of view. The hobby is bigger than that.
Send me a message — about Slabfy, about the hobby, about anything. I read everything.
Or if you just want to try it: get access here.
I'm Peter Perez Jr — founder of Slabfy, a Human Experience Labs experiment. I'm always down to talk cards or design. Hit me up.