Hi, I have downloaded an app called iStats menus and a widget called iSTAT NANO. Both show data, CPU, fan, temps etc. The main reason why i downloaded these was to monitor the fan and temp as i use my macbook on my lap more than on a hard surface so i didn't want it to get too hot. Before today i didn't even know macbooks had heat sensors in them. My question is how reliable and accurate are these heat sensors and these apps that I have. Thank you.