how to update 4 th generation ipod touch?

hi friends

i am new to this forum



i happy to join here .

i have one ipod ,it is bought on 2008 from us.

here my Questions is

recently i am install some apps from iTunes,it says

the device is not compatibility for this app update iTunes version.



how can i update my iPod?

via iLounge Forums http://ift.tt/1ibwdxA