This app is designed to compute the remaining minutes and seconds for completing a task. It also shows you the percentage of a task completed.
You choose the start and end times of a task. Then you should hit the start button, to start computing. After that you will see remaining minutes and seconds. Also, it will show you the percentage of a task completed.
If your selected start time is in the future, then the app will start computing seconds until starting a task and then shows you task remaining information.