How can I see application loggings from device?

I want to add an application logging from device. I saw in this site three ways to do it:

  1. with sending tcp-packets from device
  2. only for iPhones, by output redirection to Xcode console
  3. using corona “analytics” module

What is the best practise to add logging to application that runs on device? Thanks. [import]uid: 144261 topic_id: 30017 reply_id: 330017[/import]