What is the maximum number of threads that can be launched in a single application?

The maximum number of threads in a single iOS application is not fixed and depends on several factors: available memory, CPU resources, and operating system restrictions. In practice, launching too many threads is inefficient, as each thread consumes memory (stack) and scheduler resources.

Typically, iOS uses GCD (Grand Central Dispatch) and operations (NSOperation), which manage the thread pool and optimize their number automatically. If creating threads manually (NSThread), it is better to limit their number to dozens, otherwise the application's performance and stability may deteriorate.

Thus, the maximum number of threads depends on the specific device and task, but it is recommended to use high-level concurrency mechanisms rather than managing threads directly.