"Building an HSK Speaking Test AI: Real-time Tone Grading with Gemini

Building an HSK Speaking Test AI: Real-time Tone Grading with Gemini

I built a free Mandarin speaking assessment tool that grades tone + grammar in real time. Here's the engineering behind it.

The Problem

HSK (Chinese proficiency test) has a speaking component (HSKK), but most learners can't self-assess their level. Online tutors are expensive. Generic AI conversation tools don't grade tones.

So I built ToneTutor: a 3-minute spoken-HSK test that estimates your speaking level and identifies weak points.