The most useful feature is the timer. I can add it to my calendar and it shows me how long I have left to complete the task. I am also able to edit the timer when I am done, so there is no need to check on the app multiple times. I wish you could set reminders. I don't remember to check how much time I have left. I wish you could set reminders as well. It is a great time tracker with a timer. I can check to see how much time I have left. I can also edit the timer when I am done, so there is no need to check multiple times.