E-szám Kereső is a lifestyle app developed by Tudatos Vásárlók Egyesülete to help users identify food additives, also known as E-numbers. With this app, users can check the content of their food choices offline, without an internet connection. The app provides a brief description of the selected material, its use, production, and possible consumption-related risks.

E-szám Kereső allows users to search for additives by name and number, and filter them according to their function. The app also provides an additional five criteria for filtering additives. These include whether the additive is authorized for foods prepared for infants and toddlers (BABA), approved for organic food (BIO), whether genetically modified material may be present during production (GMO), whether it may cause allergies or allergy-like symptoms (ALLERGIA), or whether it may have other health-related effects or suspicions (KOCKÁZAT). Additionally, users can save the products where they found the additive. Overall, E-szám Kereső is a helpful tool for those who want to make informed choices about the food they consume.