Simply head over to the settings tab represented by the gear symbol and scroll down through the page until you locate the ringtone selection. From the selection, choose “Silence - Analysis only” as your ringtone to disable the alarm feature.
Unfortunately, there is no silent alarm or data analysis only ringtone for the android version of Sleep Time yet. To mute the alarm instead, head over to the settings menu and turn the alarm volume all the way down. We apologize about this inconvenience.