IOS is a mobile operating system created by Apple. It has emerged as the second most popular mobile operating system all over the world. It operates many mobile devices like iPad, iPhone and iPod touch. It is having many features like home screen, system font, folders, notification center, accessibility, multitasking, switching applications, Siri and game center, thus making it the most popular among today’s youth. The major role behind the huge success of IOS is IOS mobile apps agencies . From their deep knowledge and experience, they provide specific expertise. The developers need to be updated about the latest technology and increase their skills to gain more success. Some IOS mobile apps agencies focus on design and development while the others focus on mobile app strategy, branding and optimization. Android is also a mobile operating system but is created by Google. It has emerged as the best-selling OS worldwide on smart phones and tablets. It has over 2 billion monthly active