A lucid dream is when you become conscious to the fact that you are dreaming, empowering you to control and mold your dreams. There are various ways to promote lucid dreaming, the best of which is known as MILD (mnemonic-induced lucid dreaming). MILD involves focusing on the idea of having a lucid dream, increasing your effort to recall your dreams, and reality checks, where throughout the day you get in the habit of checking if you are dreaming (for example by looking at your watch, since you cannot read time when you are dreaming.
Proactive Sleep promotes lucid dreaming by enabling you to play default and custom sounds when you are most likely in a dream state. Based on your body movements and how much you have slept, the app can predict when you are most likely in a dream state. If dream manipulation is set to on, then the sound of your choice will play when you are most likely dreaming, cueing you to the fact that you are in a dream state and that you can lucid dream.