1
Fitia - AI Calorie Counter & Diet Plans
Fitia provides personalized meal plans and calorie/macronutrient tracking with a large, nutritionist-verified food database.
AI Tool
Napkin Math Review
Napkin Math is a personalized AI food journal and nutrition coach designed to help users understand eating habits and achieve health goals.
shipped Jun 10, 2026aifreemium
1Founded in 2026 by Manuel Castro, Claire Nord, and Jynnie Tang, a Y Combinator company.
2Operates on a freemium pricing model with monthly and annual Premium subscription options.
3Version 1.0.16 was released on May 28, 2026, as part of continuous development.
4The platform explicitly states it 'never' trains on user data, ensuring privacy.
Napkin Math at a Glance
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overview
What is Napkin Math?
Napkin Math is a personalized AI food journal tool developed by Manuel Castro, Claire Nord, and Jynnie Tang that enables individuals seeking health goals to understand their eating habits and receive personalized nutrition coaching. It focuses on intuitive eating and pattern identification rather than calorie counting. The tool functions as an AI-powered food journal, assisting users in connecting their dietary intake with their physical and emotional well-being over time. Its primary objective is to foster awareness of body responses to food, moving beyond rigid dietary plans or strict numerical tracking. Napkin Math was founded in 2026 and is a Y Combinator company, with continuous development including updates like version 1.0.16 released on May 28, 2026.
quick facts
Quick Facts
| Attribute | Value |
|---|---|
| Developer | Manuel Castro, Claire Nord, Jynnie Tang (Founders, Y Combinator company) |
| Business Model | Freemium |
| Pricing | Freemium: Free + Premium options (Monthly/Annual subscription) |
| Platforms | iOS |
| API Available | No |
| Integrations | None |
| Founded | 2026 |
| Funding | Y Combinator company |
| Privacy Policy URL | https://napkinmath.club/terms |
| User Data Training | Never |
features
Key Features of Napkin Math
Napkin Math provides a suite of features designed to facilitate personalized nutrition understanding and goal achievement, emphasizing intuitive eating and pattern recognition over traditional calorie counting.
- 1Personalized AI food journaling for tracking dietary intake.
- 2AI-powered nutrition coaching tailored to individual needs.
- 3Provides personalized dietary insights based on logged meals and user goals.
- 4Sets realistic health goals without requiring calorie counting.
- 5Helps users understand eating habits and patterns over extended periods.
- 6Identifies specific food triggers and their impact on well-being (e.g., stomach irritation).
- 7Optimizes nutrition for specific activities, such as marathon training.
- 8Facilitates easy meal logging through photo capture or textual description.
- 9Generates weekly recaps with pixelated food photos for aesthetic review.
- 10Supports gentle, sustainable dietary changes by building awareness.
use cases
Who Should Use Napkin Math?
Napkin Math is designed for a diverse range of individuals seeking to improve their relationship with food and achieve health objectives through a personalized, non-restrictive approach.
- 1Individuals aiming to achieve specific health and wellness goals through personalized guidance.
- 2Users who want to understand their eating habits and patterns over time without focusing on calorie counting.
- 3People looking to identify food triggers or manage specific dietary needs, such as stomach irritation.
- 4Athletes or individuals with specific fueling requirements, including optimizing nutrition for marathon training.
- 5Individuals seeking a healthier relationship with food, particularly those with a history of disordered eating, due to its non-calorie-counting approach.
pricing
Napkin Math Pricing & Plans
Napkin Math operates on a freemium business model, offering core functionalities at no cost. For enhanced features and a more comprehensive experience, users can subscribe to 'Napkin Math Premium.' This premium offering is available through auto-renewing subscriptions, with pricing displayed in the user's local currency directly on the in-app paywall before purchase. Payments are processed via Apple through the user's App Store account.
- 1Freemium: Provides basic access to AI food journaling and core features.
- 2Napkin Math Premium (Monthly): An auto-renewing subscription for advanced features, with specific pricing presented in-app.
- 3Napkin Math Premium (Annual): An auto-renewing subscription offering a potentially cost-effective option for advanced features, with specific pricing presented in-app.
competitors
Napkin Math vs Competitors
Napkin Math positions itself as a 'hyper-personalized AI food journal' that distinctly deviates from conventional calorie-tracking applications, emphasizing awareness and intuitive eating. Its competitive advantage lies in tailored insights and a user-friendly experience.
1
Fitia - AI Calorie Counter & Diet Plans↗
Fitia provides personalized meal plans and calorie/macronutrient tracking with a large, nutritionist-verified food database.
Similar to Napkin Math, Fitia offers AI-powered personalized nutrition guidance and food tracking with a freemium model. It differentiates with its extensive verified food database and specific focus on weight loss or muscle gain goals.
2
Alma – Track Nutrition in 10 Seconds↗
Alma offers effortless meal logging via voice, photo, or text, and provides an AI nutrition coach that offers check-ins, goal adjustments, and meal recommendations.
Alma directly competes with Napkin Math by offering AI-powered food journaling and nutrition coaching. Its strength lies in its versatile and easy meal logging methods and personalized coaching interactions.
3
EatingAI — AI Calorie Tracker & Voice Nutrition App↗
EatingAI features voice food logging, personalized nutrition analysis based on blood markers, and an AI nutritionist (Avo) that provides instant feedback and meal scores.
EatingAI offers a direct alternative to Napkin Math's AI food journaling and coaching, particularly appealing to users who prefer voice input. Its unique integration of blood test data for personalized advice sets it apart, and it operates on a 'free to try' model.
4
MyNetDiary - Free Calorie Counter and Diet Assistant↗
MyNetDiary provides a 24/7 AI Coach that offers personalized guidance based on logged data, meal suggestions, and proactive check-ins, alongside AI photo and voice logging, and a unique AI Restaurant Menu Scan.
MyNetDiary is a comprehensive AI food journal and nutrition coach, similar to Napkin Math, but offers a more extensive set of AI features including restaurant menu scanning and a highly personalized AI coach that reads user data. It has a free tier and a Premium Plus subscription, aligning with Napkin Math's freemium model.
❓
Frequently Asked Questions
+What is Napkin Math?
Napkin Math is a personalized AI food journal tool developed by Manuel Castro, Claire Nord, and Jynnie Tang that enables individuals seeking health goals to understand their eating habits and receive personalized nutrition coaching. It focuses on intuitive eating and pattern identification rather than calorie counting.
+Is Napkin Math free?
Napkin Math operates on a freemium model, offering a free tier with core AI food journaling features. Users can upgrade to 'Napkin Math Premium' via monthly or annual auto-renewing subscriptions for enhanced functionalities, with specific pricing displayed within the app.
+What are the main features of Napkin Math?
Napkin Math offers a personalized AI food journal, AI-powered nutrition coaching, personalized dietary insights, goal setting without calorie counting, identification of food triggers, and optimization of nutrition for specific activities. It supports easy meal logging and pattern identification over time.
+Who should use Napkin Math?
Napkin Math is designed for individuals seeking to achieve health goals, understand their eating habits without calorie counting, identify food triggers, or optimize nutrition for specific activities like marathon training. It is also suitable for those preferring an intuitive eating approach and a healthier relationship with food.
+How does Napkin Math compare to alternatives?
Napkin Math differentiates itself from competitors like Fitia, Alma, EatingAI, and MyNetDiary by focusing on hyper-personalized AI food journaling and intuitive eating, explicitly avoiding calorie counting. It emphasizes understanding eating patterns and feelings, whereas many alternatives offer more traditional calorie tracking, voice logging, or blood marker integration.
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