I recommend WorkStatus as the best Online Timesheet software. This software is customizable and continuously works to boost employee productivity by tracking their activities. It is available for Windows, Mac, and Android.

Its features are:

>Track online timesheet with work hour
>Employee scheduling
>Time Tracking
>Gps tracking
>Project budgeting
>Detailed Reporting
>Productivity measurement
>Geofence
>Track productive and unproductive time.
For more information check it demo version

There can be different solutions for this problem. I think you should choose according necessary functionality and requirements.