You can also try the Pomotodo app that is a combination of Pomodoro and Todo lists. The twist is you focus on the task in indivisible time slots which I feel re

You can also try the Pomotodo app that is a combination of Pomodoro and Todo lists. The twist is you focus on the task in indivisible time slots which I feel really helps you stay focused. This isn't a checklist technically, more like a task list for getting the work done but it works really well for me.