It is human tendency that we plan a lot for the day, but at the end of the day we realize that we were unable to do whole work then we start criticizing ourselves. But I would like to suggest that set a plan for the day, give your 100% in it, if you are able to complete it at the end of the day then it is good otherwise don't be so sad and not allow negativity overtake your positive thought. So be positive and be calm and do your work sincerely. Good luck, have a great day.
Thanks for sharing about this app, will give it a try.