What does Timesheet do for you? Well, Timesheet allows you to record your work with a simple push of a button. You can easily add breaks, expenses and notes. Or manage your projects and export your data to Microsoft Excel. There are clear overviews and statistics of your work efforts. And all of this can be easily backed and restored to an SD-Card or a Dropbox account. This app just screams German orderliness, no?
Some other features of this app are timetracking, create/managing projects and assigning tasks to them, decorating them with tags, breaks, expenses and notes. There's widget and location tracking support, and Dropbox is basically embedded. You can also assign a specific Wi-Fi network to a project. Once your phone connects/disconnects to this Access-point, the timer will start/stop the tracking.
Timesheet is free and can be downloaded from the Google Play Store.