Problem of Power consumption – Focus To-Do: Focus Timer&Tasks Review

The app is really helpful for me! Great! However, its power consumption is too fast. It also makes my iPhone very heat. Hope that could be improved, that way the app is perfect! Also, if the app can show the timer when I close my screen that will make me pay more attention on my work! Thanks a lot for producing this great tool!
Review by jonas134 on Focus To-Do: Focus Timer&Tasks.