Penmentor
Claude marks up your handwritten math like a teacher
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HN · launched Oct 20, 2026 · 66 upvotes (top 17%)
- Education
- Vertical SaaS
- B2C
- AI-native
- Commercial product
Similar launches
See all 409 similar launches →Could you build this?
Yes It is a UI that uploads a photo of handwritten math and sends it to a vision-capable LLM API with a teacher-style prompt, which is a thin wrapper around an existing model.
Discussion
7 comments analyzed.
Concerns raised: only tailored to Arch Linux and i3wm
Feature requests: support other LLM provider APIs, support macOS and Windows
Competitors
Other products that read as similar to this one : 409 launches clear the similarity bar, closest 8 shown.
Attention rank: #85 of 410 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 354 days after the earliest competitor.
- Claude-Fables · github · 2026-10-02 · 24 upvotes · similarity 0.56
- Mathematician-Humanizer · github · 2026-10-01 · 8 upvotes · similarity 0.56
- explainer-studio · github · 2026-10-20 · 17 upvotes · similarity 0.55
- harshpreet-hand · github · 2026-10-17 · 45 upvotes · similarity 0.53
- claude-ste-writing · github · 2026-09-10 · 11 upvotes · similarity 0.51
- ai-iso-skill · github · 2026-10-04 · 116 upvotes · similarity 0.50
- Claude Cognitive · hn · 2025-12-30 · 15 upvotes · similarity 0.50
- Claude-Skills · github · 2026-09-29 · 8 upvotes · similarity 0.50
Other launches for this product
More details
- External ID
- 50167604
- Company
- n/a
- Product
- penmentor
- Website domain
- github.com
- Cohort
- n/a
- Upvotes percentile
- 0.83
- All tags
- n/a
- AI summary
- ai grading of handwritten math work
- Manually corrected
- No