About Anh Nguyen
Building free English-learning tools for Vietnamese learners
I taught myself to code to solve the little frustrations of learning English — then I shared the tools free with everyone.
While studying IELTS Writing, I got tired of opening Oxford and Longman in separate tabs, fighting pop-ups and ads. So I built Dual Dictionary: two dictionaries side by side, offline, ad-free, no sign-up — and shared it with my study group.
Your support pays for hosting, dictionary servers, and the time to keep building the next little tools: pronunciation dictionaries, exam flashcards, and more. Everything stays free for everyone. Supporting is simply a way to say: “I like this — please keep going.” ☕
Recent supporters
Posts
If you use Dual Dictionary, it may look like it simply appeared one day. It did not. Here’s the tiny, very human three-day backstage story. Day 1 — A 404 error. I checked the server, passwords, and even wondered whether someone had broken in. The real cause? The dictionary files lived in a “dicts/” folder while the app was looking in the root folder. Like searching for Oxford on the shelf ...
Three Days Debugging One Line of NaN ☕
Sep 17, 2026
40 views