Mobile usage is growing rapidly, with 600% growth in mobile website traffic in 2010 and mobile searches up 130% that year. By 2013, mobile phones are projected to surpass PCs as the most common way to access the web globally. Apps have become a major way users engage with mobile, with 34.4% downloading apps and over half using SMS or browsing. Apps differ from mobile web in how they are packaged, discovered, monetized, interacted with and measured. Smartphone users expect fast load times and responsive design optimized for mobile. Developers must choose between cross-platform frameworks, native SDKs, or HTML5 for building mobile experiences.