Skip to content
YCX26· AI

Napkin Math

AI nutrition coach in your pocket

ActiveChecked 16h ago
Batch
X26
Status, per YC
Active
Team size
3
HQ
San Francisco, CA
In X26193 companies, 84% AI

Founders

  • Jynnie TangFounder/CEO
  • Manuel CastroFounder
  • Claire NordFounder/CTO

Same space

About Napkin Math

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.

San Francisco, CA, USA

Napkin Math: questions

Which YC batch was Napkin Math in?

Napkin Math was in Y Combinator's Spring 2026 batch (X26).

Is Napkin Math still active?

Y Combinator lists Napkin Math as active.

Who founded Napkin Math?

Napkin Math's founders, as listed on its YC page: Jynnie Tang (Founder/CEO), Manuel Castro (Founder), Claire Nord (Founder/CTO).

Where is Napkin Math based?

Napkin Math lists San Francisco, CA, USA as its location on YC's directory.

Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.

Weekly: new YC data, AI and devtools companies and status changes, Mondays.