[Canon reeves]

So how hard is the programming on the Rasberry Pi? Would it be simple enough for me to learn within a few days? Would I be able to tell a servo how far to turn in the code? Thanks for the replies! With this we are not as worried about the cost as we are about the effectiveness. We want to make sure it works well every time. Also, does arduino have a good app programming interface? So that we could connect it to an app? and does anyone know of a good sensor for detecting vibration? And does the arduino shell shield work better for long range smartphones than the raspberry pi? Thanks!