To do this, open your WiFi device in the app.
At the bottom right, go to TIMER
Now you are in the "Schedule".
Enter a turn-on time:
Open "Add timing" at the bottom
Now you can set your time and select the day(s) in the Repeat section.
Also, choose in the Switch section to turn the timer ON.
To confirm, tap Save at the top right.
You will now see a saved turn-on time in the schedule.
Enter a (corresponding) turn-off time:
Open "Add timing" at the bottom
Now you can set your time and select the day(s) in the Repeat section.
Also, choose in the Switch section to turn the timer OFF.
To confirm, tap Save at the top right.
You will now also see the saved turn-off time in the schedule.
Example: