I launched BinderDex for iOS: a faster way to track Pokémon card values and grails

Hey Indie Hackers,

I just launched BinderDex for iOS, an app for Pokémon TCG collectors who want a faster way to search cards, track values, save grails, and keep an eye on price moves.

I built it because managing a collection still feels more fragmented than it should. A lot of collectors bounce between marketplaces, spreadsheets, screenshots, notes, wishlists, and binders. That works for a while, but it gets messy once you’re tracking cards you own, cards you want, and cards whose prices are moving.

BinderDex is my attempt to make that workflow feel more native to how collectors actually behave.

Right now, the app focuses on:

Fast Pokémon card search
Saving grail cards
Tracking card values
Watching price movement
A mobile-first experience for shops, shows, trades, and sorting at home
The iOS app is built with Expo/React Native, the web side uses Next.js, and the database runs on Neon Postgres.

I’m launching early because I want real collector feedback before overbuilding. The main questions I’m trying to answer now are:

What would make this a daily-use app for Pokémon card collectors?
Should the app lean more toward collection tracking, market watching, or wishlist/grail management?
What data would you need to trust pricing and value movement?
For other indie hackers: how would you approach growth for a niche collector tool like this?
You can check it out here:
https://binderdex.com

Would appreciate any feedback on the positioning, onboarding, or feature direction.