One of the key decisions in mobile app development is choosing between native, hybrid, and web apps. Native apps are developed specifically for a particular platform, such as iOS or Android, providing the best performance and user experience. Hybrid apps, on the other hand, are built using web technologies like HTML, CSS, and JavaScript, and can run on multiple platforms. Web apps are not true apps but function like them through a browser, offering more flexibility but at the cost of performance. Each type has its pros and cons, and the choice depends on factors like budget, target audience, and required functionality.