Seeking feedback & beta testers: AI-powered coin error identification PWA

Hey Product Hunt community!

I'm currently preparing for the official launch of Coin Error Expert, an AI-driven PWA built specifically for coin collectors and numismatists.

Unlike general coin valuation or appraisal apps, Coin Error Expert focuses on detecting, identifying, and textually describing specific coin errors—such as doubled dies, off-center strikes, and planchet flaws. It also links directly into a full marketplace workflow with built-in shipping and payment integrations.

I'd love to get your thoughts:

What features do you look for when testing niche AI tools or web applications?

If you're an Android user, we are currently running our Google Play closed beta and recruiting 12 active testers!

Check out our upcoming launch page, drop your feedback below, and let me know if you'd like to test out the beta.