Guillem Hernández Riera

Hi everyone!

After months of development, we are finally opening the Beta for Lingogrind. As a maker, I realized that most language apps focus on beginners, leaving advanced students (B2/C1) stuck repeating the same structural grammar mistakes forever.

We decided to build an AI that doesn't just "teach" but acts as a pattern corrector. It identifies your specific recurring errors and helps you rewire your brain through targeted practice.

I d love to get the community's perspective on this: When building an AI-driven tool, how do you balance "automated feedback" with "user intuition"? We are currently tweaking our correction engine and would love to hear your thoughts.

"Hey Product Hunt Community!

We're building Lingogrind, an AI-powered German exam simulator (Goethe, TestDaF, telc).

When preparing for official certification exams, we found the biggest pain point is getting real, actionable feedback on Writing and Speaking. Most language apps stop at multiple-choice quizzes, leaving serious students in the dark.

Our solution? An AI engine that not only grades your exam simulation but tells you exactly which sentence needs correcting in your Writing and where your fluency breaks down in your Speaking.

Hey Product Hunt!

Lately we ve been talking with learners, teachers, and exam-prep students and there s a pain point that keeps coming up:

Most language apps make you feel like you're improving, but don t actually prepare you for real-world use.

So we ve been building something different: