Final answer:
The invention of the iPhone by Apple in 2007 sparked the emergence of mobile app development careers due to its innovative touch-screen technology and the app marketplace it introduced.
Step-by-step explanation:
In 2007, new careers in mobile app development emerged largely due to the invention of the iPhone by Apple. This revolutionary device not only functioned as a powerful cell phone but also as a portable computer, equipped with a touch-screen interface that set a new standard for smartphone technology.
The release of the iPhone and its subsequent app marketplace fostered a burgeoning industry for mobile app development, which has since become integral to the digital economy. By 2015, advancements such as artificial intelligence in cell phones enabled features like voice recognition, further expanding the capabilities and sophistication of mobile applications and smartphones.
The invention of the iPhone in 2007 by Apple Inc. led to the emergence of new careers in mobile app development. The iPhone revolutionized the smartphone industry and paved the way for the development of various mobile applications. With its touch-screen interface, wireless internet connectivity, and powerful capabilities, the iPhone sparked a wave of innovation in mobile app development.