This Frost & Sullivan tracker provides metrics on Apple's quarterly performance (for both unit sales and revenues) for iPads, iPhones, Macs, and other products, such as iPods, Apple TVs, Beats Electronics, and Apple-branded and third-party accessories. This tracker includes historical quarterly data for all of these categories, which capture important trends in the Apple ecosystem. Sophisticated modeling has been used to determine attributes that are not directly reported by Apple. With its smartphones, tablets, mac computers, and a multitude of accessories, Apple has continued to flourish in a very competitive environment. Much of the company's success can be attributed to its ongoing development of products, and its unwavering focus on the overall user experience. While many of Apple's competitors have looked at a more open ecosystem and developed their own application storefronts, Apple has created a full end-to-end ecosystem for its users, with the App Store being the center of its success.