AlarmTube allows you to wake up or fall asleep to YouTube videos, with three modes:

LULLABY: quickly schedule some videos to fall asleep to. The videos are picked at random from a pre-defined category (e.g. music), with a pre-defined search keyword (e.g. "lullaby"), and lasts for a pre-defined amount of time. These can be changed to your preference in the settings.

WAKE-UP: a similar shortcut to schedule videos to wake you up. The videos are picked according to another set of a pre-defined category, keyword, and length, which can also be changed in the settings.

ALL-PURPOSE: for any other miscellaneous time-sensitive events. Category, keyword, and length aren't pre-defined; you choose them every time you set an alarm.

Additionally, alarms can be:
- set to repeat on weekdays or weekends
- snoozed for later
- cancelled (including future alarms, if repeating)