Cocoa Touch (iOS) vs Apache Sling: What are the differences?

What is Cocoa Touch (iOS)? The Cocoa Touch collection of frameworks includes everything needed to create iOS apps. The Cocoa Touch layer contains key frameworks for building iOS apps. These frameworks define the appearance of your app. They also provide the basic app infrastructure and support for key technologies such as multitasking, touch-based input, push notifications, and many high-level system services.

What is Apache Sling? Innovative web framework that is intended to bring back the fun to web development. It is a framework for RESTful web-applications based on an extensible content tree. It maps HTTP request URLs to content resources based on the request's path, extension and selectors. Using convention over configuration, requests are processed by scripts and servlets, dynamically selected based on the current resource. This fosters meaningful URLs and resource driven request processing, while the modular nature of Sling allows for specialized server instances that include only what is needed.

Cocoa Touch (iOS) and Apache Sling can be primarily classified as "Frameworks (Full Stack)" tools.