The document discusses different types of app developers, the app market, business models for apps, and challenges and future trends for app development. It notes that there are enterprise, gaming, and advertising app developers, and that in 2013 over 100 billion apps were downloaded worldwide with India accounting for 800 million downloads. Business models for apps include time and materials, scope and milestone, transaction-based pricing, and outcome-based models. Challenges include application discovery, persuasive descriptions and testing, trials, targeting, and integration and evolution of business models. The future is predicted to include more apps in Indian languages, payment gateways, wearable apps, and predictive analytics apps.