In order to set new alarms through your device’s Clock app, tap on the alarm icon in the lower-left corner and then tap on the ‘+’ symbol in the top-right corner. Now it is simply a case of entering the time in digits for when you would like the alarm to go off.
When you have finished setting it, tap the OK button and your alarm will be saved. If you have multiple alarms set, then they will be listed and you can turn them on and off via the slider switches. By tapping on an alarm, you can also tick the Repeat box to automatically have the alarm go off at the same time every day and you can also set the desired ringtone that sounds when the alarm goes off.