I’m Manh, the maker behind OnThiTDN. As a software engineer and a father, I watched my child overwhelm themselves with endless practice tests while preparing for a highly competitive 6th-grade entrance exam. It hit me: traditional exam prep is often a "brute-force" approach—high pressure, low efficiency, and zero data optimization. That’s why I built OnThiTDN to bring data-driven efficiency to young learners. Here is how it works: The 80/20 Approach: Instead of practicing aimlessly, the app focuses 80% of efforts on the critical 20% of knowledge gaps that will yield the biggest score improvements. AI-Driven Diagnostics: Our AI tracks every response, instantly pinpointing exact weak spots by specific micro-topics (Logic Math, English, Science). Parent Insights: It bridges the gap between parents and kids by providing real-time progress tracking, turning anxiety into actionable support. While the current version is localized for a major entrance exam in Vietnam (Trần Đại Nghĩa school), the underlying core logic of personalized micro-topic analysis and 80/20 optimization is something I aim to scale globally for competitive exams. I’d love to get your feedback on the UX/UI, the personalization flow, or any ideas on EdTech micro-learning! Thank you so much for your support! 🚀

OnThiTDN

Optimize exam prep with AI and the 80/20 principle

Optimize exam prep with AI and the 80/20 principle