KeepPet is a global pet registration platform. Using the application users can easily create a passport for their pet and save information about their pet’s health, location, and pedigree. Blockchain technology, implemented with the Ethereum platform, eliminates the loss or forgery of the passport.Our team developed the design, iOS and Android applications, designed a server architecture and developed a backend service, and also implemented Ethereum to integrate data decentralization. We have also developed a convenient administration panel with access differentiation for different roles: veterinarians, pet shop employees, border control, etc.