✔ Rain on puddle
✔ Rain on leaves
✔ Heavy rain
✔ Thunderstorm
✔ Ocean
✔ Sea
✔ Lake
✔ Creek
✔ Forest river
✔ Mountain river
✔ Waterfall
✔ Wind
✔ Fan
✔ Air conditioner
✔ Vacuum cleaner
✔ Hair dryer
✔ Washing machine
✔ Boiling kettle
✔ Shower
✔ Fireplace
✔ Airplane
✔ Train
✔ Car
✔ Cat purring
✔ In the womb
✔ Mother (Shush)
✔ Heartbeat

From practical experience, we have learned that such white noise sounds are more effective as a lullaby for baby sleep than music, tones or sing.
Babies love white noise. Background white noise is calming for baby and resembles the kind of sounds that he would hear in the womb.

This app can also be used as a sound machine (white noise machine) by adults suffering with insomnia or sleep disorders.
The masking effect of white noise is also great for relaxation, concentration and study.

App features:

✔ 36 white noise sounds
✔ 4 baby lullabies
✔ Infinite playback
✔ Timer with soft fade out
✔ Mixer with support for adjusting the volume of each sound in the mix
✔ Background audio support
✔ No full-screen ads
✔ Offline working
✔ Lightweight and easy to use

We do highly recommend not putting the phone closer to the baby than necessary.