A sound signal can be added to the activity which will repeat itself multiple times when the activity starts.

You can wake someone with the message “It is time to get up”. By selecting the sound signal, the message will be repeated for a number of times, for example 5, at the activity’s start. The frequency should be set on 1 and repetition on 5. The volume can be adjusted on the DayClock. Put “Alarm volume” and “Notification volume” in the Android menu on 0 and the “Media volume” on maximum sound. The amplitude can be adjusted with the volume bottom on the DayClock. Waking up should not be that hard anymore… Another option is to add a repeating sound signal to any random activity. This can be useful to direct the attention to the new activity.