Hey Product Hunt, Albert here, one of the makers.

The story: I'd been wanting to learn Dart and Flutter for mobile development for a while, but as a Java developer I kept stalling. Every time I sat down to read the docs I bounced off the wall of text. I wanted the version that says "here's what's the same as Java, here's what's different, here's the thing that'll trip you up" and that course doesn't exist on the internet. One night I couldn't sleep, mind racing about exactly this, and it clicked that the idea wasn't really about Dart at all. You could generate a bite-sized course for literally any subject, on demand, instead of hoping someone has already written one. I turned to my partner and asked her to text me one word, "flashcards," so I wouldn't lose it by morning. I didn't. The next day I researched it, found nothing like it, played with the concept, saw that it actually worked, and built the app.

That's Erudity. You type any subject (the economics of Formula 1, how anaesthesia actually works, or Dart for Java developers), pick a difficulty level, and we generate a course of flashcards on it. Each card has a question on the front and the answer on the back; you tap to flip. If any card catches your eye, tap "Deep Dive" and you get a ~300-word long-read on that specific thing.

The part I still find funny: I learned Dart with Erudity, I learned app development with Erudity, and I learned how to launch an app with Erudity, all while building Erudity. It ended up teaching me the very thing I was using it to build.

A few design choices we're proud of:
- The card flip itself. We spent a long time on the swipe-to-flip rhythm. It's the most-touched interaction in the app.
- Deep Dives. Every card opens into a fuller explanation. The shallow flashcards are the entry point; the depth is real.
- The generated artwork. Every subject gets its own AI-generated image. My partner and I went back and forth on whether this was even a good idea; she won, and she was right. They look cool and they make each deck feel like its own thing.
- XP and milestones. Designed to reward depth and breadth, not speed.
- The loading screens. Generate a deck and watch the loader for a bit. There's a cast of small characters in there we hope you enjoy.

Pricing: $8.99/mo or $69.99/yr (annual works out to about $5.83/mo, roughly a third off). 7-day free trial.

The stack (if you're curious): Flutter for iOS and Android, a GCP Cloud Run backend (Node and TypeScript), Gemini for generation, RevenueCat for subscriptions, and Firebase for auth.

We're a three-person team. I built the app, my partner runs growth and marketing, and my brother did the UI design (he's got a far better artistic sense than me and built the whole thing out in Figma). We bootstrapped the whole thing.

Open to and seeking all and any feedback: design, content quality, pricing, anything. The first 24 hours of PH life are a bit nerve-wracking and I'd love to hear honest takes. Particularly curious to hear what weird subject you try first.

IOS: https://erudity.app/download/appstore
Android: https://erudity.app/download/googleplay
Site: https://erudity.app

Thanks for taking a look 🦉

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