Show HN: Penmentor – Claude marks up your handwritten math like a teacher

abdullahalharir 60 points 7 comments October 20, 2026

Discussion Highlights (4 comments)

wyla

Would this work with other LLM provider APIs other than the ones you’ve listed?

Intragalactic

Woah this is beautiful. There's never been a better time to be a curious person that wants to understand how things work.

greenavocado

I need to test drive this for homeschooling purposes

RGS1811

I love it. The graphing tool is awesome.