Frima Alert - Stop refreshing. Start winning rare items in Japan.

Hey Product Hunt and Bro! 👋 I'm thrilled to share Frima Alert with you today! Why I Built This A few years ago, my friend and I started a vintage clothing business in Japan. We quickly discovered that Mercari (Japan's largest resale marketplace) was a goldmine for ultra-rare pieces—vintage band tees, deadstock sneakers, designer items at fraction of retail prices. But there was a massive problem: the competition was insane. Mercari has millions of new listings every single day. Rare items would sell within 60 seconds—literally before we could even click "buy." We tried taking turns refreshing the app every few minutes, setting alarms throughout the day, even waking up at 3 AM to check. It was exhausting and unsustainable. I realized we needed a better solution: automated alerts that would notify us the instant something matched our criteria. That's how Frima Alert was born. How It Works ・Set your keywords (brands, models, specific items you're hunting) ・Configure price ranges and exclusion filters ・Get instant push notifications when matching items are listed ・Never miss a deal again What Makes Japan's Market Unique Japan's secondhand ecosystem (Mercari, Yahoo Auctions, PayPay Flea Market, Rakuma) is one of the world's most active. The sheer volume is overwhelming—but also full of incredible opportunities if you can move fast enough. Who It's For ✅ Vintage clothing resellers and collectors ✅ Sneakerheads hunting limited releases ✅ Anyone tired of missing deals by seconds ✅ Bargain hunters who want first access The Challenge The hardest part of building this was handling the massive data flow. Mercari alone processes millions of listings daily. Optimizing the system to scan, filter, and notify in real-time without any delays was a technical challenge—but we made it work. 💪 Now my friend and I actually have time to sleep. 😴 I'd Love Your Feedback! Have you ever missed out on something rare because someone else got there first? What marketplaces do you use in your country? Let me know! 🙏 Thanks for checking out Frima Alert!