There is also a highly-rated app called Focus To-Do: Pomodoro Timer & To Do List that many users like. On the iOS App Store, Tomato Timer - Time Manager (a newer app) and the Be Focused - Focus Timer.

Set Your Timer: Set a timer for 25 minutes. This 25-minute interval is called a "Pomodoro." Work with Focus: Dedicate yourself entirely to the task during this time.

He took a tomato-shaped kitchen timer (hence the name Pomodoro) and found that if he broke tasks into 25-minute sessions, now known as Pomodoros, followed by a 5-minute break, and then took a ...