Ключевые слова: app design, app development, app prototyping, concept, design concept, design software, development, graphic design, graphic development, interactive design, interface design, mobile app, mobile development, mobile prototype, mobile ui, mockup testing, prototype, prototype design, prototype testing, software, software development, testing, ui design, ui testing, ui ux design, usability testing, user experience, user interface, user testing, visual design,