How does twiiter and facebook's mobile applications work and how would you recreate it?

[Iain H]

It can take months to create a mobile phone app there are university courses in it which are 3 years long so imagine studying how to programme for 3 years just to develop a phone app. The complexity of a phone app depends on what it is for an example tetris would be simple where's sims 3 wouldn't be see what I mean so something like this would be difficult to answer.