Book'Mee records your time spent at work.
Features :
Configure -> Your work profile , start time for working day , end time for working day , lunch break time, days off
Manual actions -> START recording ( comment , option: set a past time ) END recording ( comment, option : set a past time)
Statistics -> Computed extra time, time spent at work per day & month, previous months ...
Daily Notifications: reminders for day start & end
Enjoy!