Running a subprocess in iOS?

Question

Can I launch a new subprocess in iOS? (from a regular application) If possible, how to do this?

Answer 1

While this is possible with jailbreak applications, the SDK does not allow this. You are only allowed your own application process. It can work in the background (for a limited period of time) and / or have, as you say, many threads, but they must all belong to the same process.