Napkin Math
Napkin Math is a YC Spring 2026 (P26) company. Based in San Francisco, CA, USA. Team of 3.
About Napkin Math
Summary
Napkin Math builds a personalized AI food journal that replaces generic calorie-tracking apps. Users log meals and receive coaching tailored to their specific health goals and daily routines, such as marathon training or identifying food triggers, rather than a one-size-fits-all deficit plan. The product uses gamification to drive daily logging habits in a category where most people abandon traditional trackers.
Go-to-market
Napkin Math targets individual consumers seeking personalized nutrition guidance and is available directly to users as a self-serve product.
From the Y Combinator listing
AI nutrition coach in your pocket
Napkin Math is the personalized AI food journal that people love to use. We gamify nutrition tracking so people are 2x more likely to stick with us than other trackers. Claire, Manuel, and I (best friends for 10 years from MIT) are obsessed with how we can make nutrition fun, and turn fun into health outcomes. === Existing consumer health apps focus on scaling a one-size-fits-all solution: calorie deficits. But they don’t answer the questions you actually have. Food is deeply personal, and so is Napkin Math: Get the fuel you need for marathon training, while understanding you eat catered office lunches five days a week. Discover what’s triggering your stomach irritation, without sacrificing your weekly dinner with friends. Napkin Math tailors a plan for not only your specific health goal, but also your life.
Facts
- Consumer / Consumer
- San Francisco, CA, USA
- 3
- Active
- Early
Founders (3)
- Claire Nord
- Jynnie Tang
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