Agricultural products are the basis of human nutrition. Technology is gaining more and more ground within the sector, becoming a determining factor in increasing productivity. Vegetables are crops of great economic importance, specifically tomatoes (Solanum lycopersicum L.), peppers (Capsicum annum L.) and cucumbers (Cucumis sativus L.) are among the most widely grown vegetables in Cuba. Diseases and pests greatly limit the productive yield indexes. The main objective of this research focuses on the development of a mobile application that allows the presumptive diagnosis of the main diseases and pests that affect these horticultural crops in the country. For the design of the application, Android Studio is used as the working environment and Java is used as the programming language. Based on the defined design requirements, clean architecture methods are used for the design of the software and guidelines are considered for the design of the user interface.