Different colors have different psychological effects. Scientific studies suggest that light towards the red end of the spectrum is most conducive to sleep. However, blue and green light also have calming effects. ZonkLight allows you to choose between an evening glow, blue and green.
Familiar environmental sounds can be very soothing. They can also block out unpleasant sounds. Zonkopia uses sound in conjunction with light to guide your breathing and promote relaxation. Zonkopia lets you choose between 3D stereo chimes and soothing waves.