Yuyin - AI Chinese Pronunciation Coach

Hey Product Hunt community! 👋 I'm Greg, and I've been learning Chinese for a while now. Here's the thing nobody tells you — you can nail every vocab quiz, memorize hundreds of characters, and still have native speakers look at you like you're speaking another language. Because in Chinese, pronunciation is everything. That's exactly why I built Yuyin. Most apps teach you to read and tap the right answer, but they never actually listen to you speak. Yuyin does. Record yourself saying a sentence and get instant, word-by-word feedback on your pronunciation — what sounded natural, what needs work, and how to fix it. It's like having a patient tutor who never gets tired of correcting you. And it's not just drills. You can jump into real spoken conversations — ordering at a restaurant, checking into a hotel, even doing a mock job interview — all in Chinese, with AI scoring your fluency and accuracy as you go. There's also dedicated tone training with 5 native speaker voices (because tones are the sneaky thing that trips everyone up), character stroke-order practice, structured HSK 1–6 courses, and a spaced-repetition word bank. We've had a web version running for a while, but the iOS app is the full experience with way more features — this is the version I'm most excited to share. If you're learning Chinese or have ever struggled to be understood, I'd love to hear what would make this more useful for you. Happy to answer any questions!