penmentor
AI mentor that corrects your written math visually with local harnesses.
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GITHUB · launched Oct 17, 2026 · 77 upvotes (top 19%)
- Education
- Agent / copilot
- B2C
- AI-native
- Hobby / open-source project
Similar launches
See all 2507 similar launches →Could you build this?
Partial The visual correction UI is buildable, but reliably recognizing handwritten math and verifying each step's correctness is harder than a vision-LLM prompt alone.
What it would actually take: Pair handwriting math recognition (an OCR model that outputs LaTeX, or a vision LLM) with a symbolic checker such as SymPy or CAS verification for each step. The UI overlays corrections on the user's strokes or image. The hard parts are accurate handwriting-to-expression parsing and robust step-level error localization, which need ML tuning and math-education expertise to get right.
Competitors
Other products that read as similar to this one : 2507 launches clear the similarity bar, closest 8 shown.
Attention rank: #426 of 2508 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 353 days after the earliest competitor.
- MathmoBench · github · 2026-09-23 · 88 upvotes · similarity 0.64
- Visually Precise AI Tutoring on iOS · hn · 2026-08-15 · 10 upvotes · similarity 0.63
- Mathematician-Humanizer · github · 2026-10-01 · 8 upvotes · similarity 0.61
- ari · github · 2026-10-18 · 178 upvotes · similarity 0.59
- aes · github · 2026-09-27 · 7 upvotes · similarity 0.59
- Ramanujan · hn · 2026-09-06 · 5 upvotes · similarity 0.56
- math-research-collaborator · github · 2026-09-13 · 8 upvotes · similarity 0.56
- content-principles · github · 2026-10-13 · 151 upvotes · similarity 0.56
Other launches for this product
More details
- External ID
- 1423352379
- Company
- n/a
- Product
- penmentor
- Website domain
- github.com
- Cohort
- n/a
- Upvotes percentile
- 0.81
- All tags
- n/a
- AI summary
- ai math tutor that visually corrects written work
- Manually corrected
- No