Moodle mobile app 3.3.2 session logged out after 4 hours in ios 11.2.6

volgens Sourav074 ..  

moodle mobile app (v3.3.2) session logged out after 4 hours in ios 11.2.6. any suggesions to fix this issue?

I changed in config.php

$CFG->sessiontimeout = 31557600;

and also changed in database mdl_config as sessiontimeout : 31557600 but in ios(v11.2.6) its logged out after 4 hrs.