Program to visualise working time

The program will get input about time slots where the user worked and it needs to visualise how much he/she worked during the day/week/month. The user can set targets for every day/week/month and can see whether he has reached his goal and what is overalll 'success rate' (actually worked/goal) is. The program is for Windows, but follow up projects will be for OS X, iOS and Android.