I want to create a timer in django that would start timer and stop timer and would be stored and a report could be generated

I am developing a django web application of Freelancers, in which the Freelancers would be working on a project that would have a functionality of Start and Stop timer , and this time difference would be stored in minutes(like 27 minutes worked or 65 minutes worked ), and also all this time would be added at the end of the week or month and a report is generated for this time. Please help…

Take a look on a similar project to help you.