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Visit Show HN: Penmentor – Claude marks up your handwritten math like a teacher ↗
Penmentor is an AI tool that interprets handwritten math problems and returns detailed, teacher-style markup using Claude. It’s designed to give students instant feedback and help educators streamline grading.
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Listed as Free. Pricing changes often — confirm on the official site.
Penmentor uses Claude AI to grade and add teacher-style markup to handwritten math problems, acting as a virtual math teacher.
Yes, Penmentor is completely free to use with no pricing tiers or hidden costs.
Students, educators, and anyone needing quick feedback on handwritten math work will benefit from Penmentor.
Visit the GitHub repository linked on the Show HN post, follow the setup guide, and upload your handwritten math problems to get started.
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