I thought this app was so silly when I was introduced to it, but two months later Im hooked. I immediately fell asleep to the fan but dont rely on it every night. Its helped my husband and I sleep through fireworks and much more. We have a very open floor plan which usually means we can hear anything in the house. However, we have had guests stay with us who have infants and we dont hear them cry in the middle of the night at all while using the app.
BrittLdy about Bed Time Fan - White Noise Sounds, v1.4