Mobile phones have evolved significantly since their introduction in 1973. Motorola introduced the first handheld mobile phone, while the iPhone launched in 2007 has sold over 60 million units. Smartphone usage and app purchases have grown enormously, with over 225,000 apps available today on Apple's App Store. Mobile phones are now ubiquitous, with 9 in 10 Americans owning a cell phone, and are integrated into most aspects of modern life. They have transformed how people communicate and access information globally.