Timer for battery

Help please. I can’t see how to set a timer in the app to collect cheap energy?
I tried to post before, but don’t seem to receive any replies?🤷‍♂️

Swalker there should be a gears icon on the top-right corner of the app. The timers can be set there.
If you don't have that icon, open the menu, choose preferences, and ensure that "show system modes button" is on.