Best Sports Card App in 2026: A Product Designer's Honest Take

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

Slabfy is the app I wish I had.

I didn't build it to compete with anyone. I built it because I needed it. Every feature exists because I hit a wall doing something with my own cards and thought "this should be better."

• The Buying Desk exists because I was tired of juggling three apps at a show table.
• The grade ladder exists because I wanted math, not gut feeling.
• The card show POS exists because I was tracking sales in a notes app.
• Consignment management exists because spreadsheets are painful.
• Flip Finder exists because I wanted eBay deals to come to me.
• The AI Analyst exists because I wanted something that knows my cards better than I do.

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 Honest Part

Is Slabfy the best sports card app? I don't know. "Best" depends on who you are.

The other apps have been around longer. They have bigger communities. They've earned their reputation. I respect that.

Slabfy is new. Still in beta. Still being built every single week.

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 designed with the same care you'd put into protecting a PSA 10. Something that treats this hobby — and the people in it — with respect.

No dark patterns. No streak counters. No engagement tricks. No manipulation.

Just an honest app, built by someone who actually uses it. Every day.

I built it for me. I'm sharing it because I think you might want the same thing.

I'm Peter Perez Jr — founder of Slabfy, a Human Experience Labs experiment. If you want to try what we're building, get access here. If you just want to talk cards or design, I'm always down.