Focus Sessions is a simple Timer with Todo list app.It helps to keep track of how much time you are spending on a particular task and total time spent on entire day.
It has:
1.History tab where total time spent on each day will be shown with date.
2.Focus tab from where you can start timer to start focusing on.It is where you can also select a task/todo to focus on.
3.Todo tab where you can create new Todo's.Here all your Todo's along with time spent on each of your Todo is shown.

It is mainly designed to keep functionality simple with core requirements.