Mr Lock is an app for Nokia Symbian touch phones which allows you to set autolock timing for your phone.  Once enabled, it automatically locks your mobile.
 You can enable auto lock functionality in any of your selected profile or on all profiles. You can also set this functionality on any perticular application or on all application. The auto lock period can be set in seconds. It also allows you to set exceptions (i.e. the applications on which you does not want auto lock).