Question: How can I get access to a large catalog of foods and their nutritional information for my nutrition app?

For a large catalog of foods and their nutritional information, Edamam offers three APIs: Food Database API, Nutrition Analysis API, and Recipe Search API. These APIs offer a wealth of nutrition data and recipe information that can be used in wellness and health apps. The Food Database API in particular offers a large catalog of foods and their nutritional information, which can be useful for apps that need detailed nutrition data.

Journable also has a large food database, along with AI-powered features for tracking diet and exercise. It includes a chat-based calorie tracker and personal health goal setting, so it's a good general-purpose tool for health app development.

For a broader range of information, Wolfram|Alpha gives you access to a vast library of nutritional data and expert-level knowledge. It can handle detailed nutrient analysis and a broad range of health-related questions, so it's a good choice for apps that need a lot of nutritional information.